Textured Clam Shells Blanket

Free DIY Instructions

A snuggly square crochet blanket featuring textured clam shells.

Quick, easy and relaxing project. Addictive and fun two-round repeat.

Perfect special occasion gift for a baby shower, housewarming, Mother’s Day, or birthday.

Size easily adjusted to preference.

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This is an original pattern by Farrah Jane Tate. You are welcome to sell products you have made using my patterns; however, I ask that you refer to the exact name of my pattern somewhere in the text of your listing. You may not copy, re-publish, sell, distribute, translate without permission, or claim my photos or patterns as your own in any way. This pattern may not be used in a classroom/workshop setting without my permission. Please note: If you have downloaded this pattern from an unofficial site (other than Ravelry, Love Crafts, Etsy, or my personal blog), this will be an unauthorised version and may not be the most current version. Please visit one of these sites to download an official, version-controlled copy.

Inspiration

The idea for this pattern first came to me in 2018 when I was in need of a pretty, shell blanket design that was made in the round and could be worked up much more quickly than other popular shell blankets, such as the Beautiful Shells blanket.

This design originally made its way into the world as Clam Shells Got This Round blanket pattern.

The pattern wasn’t written overly well and contained some stitch count errors that were long overdue to be fixed.

Even still, the design proved popular and many sweet blankets were made.

It seemed well worth the effort to revisit the design and give it a new lease on life with a reformatted PDF and also adding a free forever version to my Blog.

This blanket works up very quickly and easily, without the need for much concentration. It is the perfect project to snuggle under and make mindlessly whilst watching a Netflix show.

If you are making this blanket as a gift consider also making a cute matching beanie from the Shellastic Beanie pattern.

Pattern Details

Refer to Appendix A for example project details, including pictured projects.

Project Level: Easy
Yarn: Fingering/3ply/Cat. 1 or Sport/4-5ply/Cat. 2 or DK/8ply/Cat. 3 or Worsted/10ply/Cat. 4 or Chunky/12ply/Cat. 5 weight yarn. Low-pill or non-pill, easy wash fibre (such as cotton, cotton blends, bamboo blends, and certain acrylics and easy wash wools).
Hook: Use yarn label as a guide. Swatch to determine the optimal hook size to achieve desired drape/softness.
Blanket Size: Size to individual preference. Size will vary with number of repeats worked, weight of chosen yarn and hook size.
Gauge: Specific gauge not required.
Notions: Scissors, darning needle.
Stitch Terminology: US. Refer to Abbreviations and Special Stitch Instructions.
Pattern Synopsis: Square blanket constructed in the round alternating right side and wrong side. The blanket design repeats over two rounds (Shell Round and Textured Clam Shell Round).
Social Media Share: @TheCrochetFix #TexturedClamShellsBlanket

Abbreviations

~ = Approximately.
Actl = Actual.
Beg = Beginning.
Btwn = Between.
Ch = Chain.
DC = Double Crochet.
DK = Double Knit yarn. Equivalent to an 8ply or light worsted weight yarn.
Fin = Finishing.
FLO = Front Loop Only.
MC = Magic Circle.
Rep(s) = Repeat(s).
Rnd(s) = Round(s).
RS = Right Side.
SC = Single Crochet.
Sk = Skip
Sl St = Slip Stitch.
Sp = Space
St(s) = Stitch(es).
StSC = Stacked Since Crochet Stitch. Refer to Special Stitch Instructions and YouTube tutorial.
WS = Wrong Side.
Yo = Yarn over (hook).

Special Stitch Instructions

StSC

Note: Can be substituted with (Ch 1, SC, Ch 2), any other chainless DC, or Ch 3. This stitch is also sometimes referred to as a standing stitch.

Ch 1, SC in first st, Ch 1, SC in FLO of SC that was just made (i.e. stacking second SC on top of first SC).

Tips

Although colour changes are (intentionally) not incorporated into the pattern instructions these can be made as preferred (such as after every clam shell repeat, or after every second clam shell repeat, etc.).
When fastening off a colour after a round, always leave sufficient tail length to securely sew in on WS.

Pattern Instructions

Notes:

The blanket is made in the round, from a two-round repeat:

1. Shell Round.
2. Textured Clam Shell Round.

Shells include Corner Shells and Side Shells.

There will always be four Corner Shells (one in each of the four corners) in each repeat. These will have 7 DC in the first round of the repeat.

Side Shells will be made from Repeat 2 onwards and will increase in number with each subsequent repeat (by one per side or by four in total). These will have 5 DC in the first round of the repeat.

Every round from Round 2 onwards begins and finishes in the middle stitch of a Corner Shell. This provides the neatest seam and enables continuation with same colour for multiple repeats (if preferred).
Rounds will be alternated RS/WS (as indicated in instructions).
Work all stitches in ( ) in the same stitch from the previous round.
[ ] contain a short stitch sequence that will be worked multiple times when constructing a single side of the blanket.
* * contain longer stitch sequence for an entire side of the blanket.
A stitch count follows each round instructions in ( ).
StSC are included in the DC stitch count.
Sl St to complete the round are excluded from the stitch count and should not be worked into in the following round.
Refer to Appendix B of pattern PDF for photo images of first two repeats.

Circle

Beg Circle

Leaving a beg yarn tail of sufficient length to sew in, make a circle with either MC, or Ch 4 and Sl St into first Ch.

Rnd 1

(StSC, 15 DC) in circle, Sl St into StSC.

(St Count: 16 DC)

Pull circle taut if using MC.

First Rep

Rnd 2

Note:

Refer to PDF Appendix B Image 1 for image of completed round.

(StSC, 3 DC) in first st (i.e. the Rnd 1 StSC) (Corner Shell partially made), sk next st, SC in next st, sk next st (first side made).

*7 DC in next st (Corner Shell made), sk next st, SC in next st, sk next st* (second side made).

Rep sts btwn * * another two times (for third and fourth sides).

3 DC in first st (alongside StSC) (Corner Shell made), Sl St into StSC.

(St Count: 4 Corner Shells (each with 7 DC), 4 SC)

Rnd 3

Notes:

All SCs in this round will be made in a SC from the previous round.
Refer to Appendix B Image 2 for image of completed round.

Turn to WS. (StSC, DC) in first st (i.e. the Rnd 2 StSC), DC in next st, 2 DC in next st, DC in next st (Corner Textured Clam Shell partially made), SC in next SC, DC in next st, 2 DC in next st, DC in next st (first side made).

*3 DC in next st, DC in next st, 2 DC in next st, DC in next st (Corner Textured Clam Shell made), SC in next SC, DC in next st, 2 DC in next st, DC in next st* (second side made).

Rep sts btwn * * another two times (for third and fourth sides).

DC in first st (alongside StSC) (Corner Textured Clam Shell made), Sl St into StSC.

(St Count: 4 Corner Textured Clam Shells (each with 11 DC), 4 SC)

Second Rep

Rnd 4

Notes:

Ensure the Sl St join from the previous round is not worked into in this round. Work the StSC into StSC from the previous round.
7 DC Corner Shells will be made in the middle DC of a Corner Textured Clam Shell from the previous round.
5 DC Side Shells will be made in a SC from the previous round.
Refer to Appendix B Image 3 for image of completed round.

Turn to RS. (StSC, 3 DC) in first st (Corner Shell partially made), sk next two sts, SC in next st, sk next two sts, 5 DC in next SC (Side Shell made), sk next two sts, SC in next st, sk next two sts (first side made).

*7 DC in next st (Corner Shell made), sk next two sts, SC in next st, sk next two sts, 5 DC in next SC (Side Shell made), sk next two sts, SC in next st, sk next two sts* (second side made).

Rep sts btwn * * another two times (for third and fourth sides).

3 DC in first st (alongside StSC) (Corner Shell made), Sl St into StSC.

(St Count: 4 Corner Shells (each with 7 DC), 4 Side Shells (each with 5 DC), 8 SC)

Rnd 5

Note:

All SCs in this round will be made in a SC from the previous round.
Refer to Appendix B Images 4 and 5 for images of completed round.

Turn to WS. (StSC, DC) in first st, DC in next st, 2 DC in next st, DC in next st (Corner Textured Clam Shell partially made), SC in next SC, DC in next two sts, 3 DC in next st, DC in next two sts (Side Textured Clam Shell made), SC in next SC, DC in next st, 2 DC in next st, DC in next st (first side made).

*3 DC in next st, DC in next st, 2 DC in next st, DC in next st (Corner Textured Clam Shell made), SC in next SC, DC in next two sts, 3 DC in next st, DC in next two sts (Side Textured Clam Shell made), SC in next SC, DC in next st, 2 DC in next st, DC in next st* (second side made).

Rep sts btwn * * another two times (for third and fourth sides).

DC in first st (alongside StSC) (Corner Textured Clam Shell made), Sl St into StSC.

(St Count: 4 Corner Textured Clam Shells (each with 11 DC), 4 Side Textured Clam Shells (each with 7 DC), 8 SC)

Third Rep

Rnd 6

Notes:

Ensure the Sl St join from the previous round is not worked into in this round. Work the StSC into StSC from the previous round.
7 DC Corner Shells will be made in the middle DC of a Corner Textured Clam Shell from the previous round.
5 DC Side Shells will be made in a SC from the previous round.

Turn to RS. (StSC, 3 DC) in first st (Corner Shell partially made), sk next two sts, SC in next st, sk next two sts, 5 DC in next SC (Side Shell made), sk next three sts, SC in next st, sk next three sts, 5 DC in next SC (Side Shell made), sk next two sts, SC in next st, sk next two sts (first side made).

*7 DC in next st (Corner Shell made), sk next two sts, SC in next st, sk next two sts, 5 DC in next SC (Side Shell made),sk next three sts, SC in next st, sk next three sts, 5 DC in next SC (Side Shell made), sk next two sts, SC in next st, sk next two sts* (second side made).

Rep sts btwn * * another two times (for third and fourth sides).

3 DC in first st (alongside StSC) (Corner Shell made), Sl St into StSC.

(St Count: 4 Corner Shells (each with 7 DC), 8 Side Shells (each with 5 DC), 12 SC)

Rnd 7

Note: All SCs in this round will be made in a SC from the previous round.

Turn to WS. (StSC, DC) in first st, DC in next st, 2 DC in next st, DC in next st (Corner Textured Clam Shell partially made), SC in next SC, [DC in next two sts, 3 DC in next st, DC in next two sts (Side Textured Clam Shell made), SC in next SC] work two times in total, DC in next st, 2 DC in next st, DC in next st (first side made).

*3 DC in next st, DC in next st, 2 DC in next st, DC in next st (Corner Textured Clam Shell made), SC in next SC, [DC in next two sts, 3 DC in next st, DC in next two sts (Side Textured Clam Shell made), SC in next SC] work two times in total, DC in next st, 2 DC in next st, DC in next st* (second side made).

Rep sts btwn * * another two times (for third and fourth sides).

DC in first st (alongside StSC) (Corner Textured Clam Shell made), Sl St into StSC.

(St Count: 4 Corner Textured Clam Shells (each with 11 DC), 8 Side Textured Clam Shells (each with 7 DC), 12 SC)

Fourth Rep

Rnd 8

Notes:

Ensure the Sl St join from the previous round is not worked into in this round. Work the StSC into StSC from the previous round.
7 DC Corner Shells will be made in the middle DC of a Corner Textured Clam Shell from the previous round.
5 DC Side Shells will be made in a SC from the previous round.

Turn to RS. (StSC, 3 DC) in first st (Corner Shell partially made), sk next two sts, SC in next st, sk next two sts, 5 DC in next SC (Side Shell made), [sk next three sts, SC in next st, sk next three sts, 5 DC in next SC (Side Shell made)] work two times in total, sk next two sts, SC in next st, sk next two sts (first side made).

*7 DC in next st (Corner Shell made), sk next two sts, SC in next st, sk next two sts, 5 DC in next SC (Side Shell made),[sk next three sts, SC in next st, sk next three sts, 5 DC in next SC (Side Shell made)] work two times in total, sk next two sts, SC in next st, sk next two sts* (second side made).

Rep sts btwn * * another two times (for third and fourth sides).

3 DC in first st (alongside StSC) (Corner Shell made), Sl St into StSC.

(St Count: 4 Corner Shells (each with 7 DC), 12 Side Shells (each with 5 DC), 16 SC)

Rnd 9

Note: All SCs in this round will be made in a SC from the previous round.

Turn to WS. (StSC, DC) in first st, DC in next st, 2 DC in next st, DC in next st (Corner Textured Clam Shell partially made), SC in next SC, [DC in next two sts, 3 DC in next st, DC in next two sts (Side Textured Clam Shell made), SC in next SC] work three times in total, DC in next st, 2 DC in next st, DC in next st (first side made).

*3 DC in next st, DC in next st, 2 DC in next st, DC in next st (Corner Textured Clam Shell made), SC in next SC, [DC in next two sts, 3 DC in next st, DC in next two sts (Side Textured Clam Shell made), SC in next SC] work three times in total, DC in next st, 2 DC in next st, DC in next st* (second side made).

Rep sts btwn * another two times (for third and fourth sides).

DC in first st (alongside StSC) (Corner Textured Clam Shell made), Sl St into StSC.

(St Count: 4 Corner Textured Clam Shells (each with 11 DC), 12 Side Textured Clam Shells (each with 7 DC), 16 SC)

Additional Reps

Keep working the two-round repeat, as per instructions below, until the blanket is sufficient size. If preferred, work the Optional Final Round (more rounded corners) instructions on next page for the final round.

Refer to the Repeat Table (below) to find the number of times (in total) the [ ] stitches should be made, the number of Side Shells and the SC stitch count, per side, for the applicable round.

Rep Rnd 1 – Shells

Notes:

Ensure the Sl St join from the previous round is not worked into in this round. Work the StSC into StSC from the previous round.
7 DC Corner Shells will be made in the middle DC of a Corner Textured Clam Shell from the previous round.
5 DC Side Shells will be made in a SC from the previous round.

Turn to RS. (StSC, 3 DC) in first st (Corner Shell partially made), sk next two sts, SC in next st, sk next two sts, 5 DC in next SC (Side Shell made), [sk next three sts, SC in next st, sk next three sts, 5 DC in next SC (Side Shell made)] work until Side Shell made in last SC on the side, sk next two sts, SC in next st, sk next two sts (first side made).

*7 DC in next st (Corner Shell made), sk next two sts, SC in next st, sk next two sts, 5 DC in next SC (Side Shell made), [sk next three sts, SC in next st, sk next three sts, 5 DC in next SC (Side Shell made)] work until Side Shell made in last SC on the side, sk next two sts, SC in next st, sk next two sts* (second side made).

Rep sts btwn * * another two times (for third and fourth sides).

3 DC in first st (alongside StSC) (Corner Shell made), Sl St into StSC.

Rep Rnd 2 – Textured Clam Shells

Note: All SCs in this round will be made in a SC from the previous round.

Turn to WS. (StSC, DC) in first st, DC in next st, 2 DC in next st, DC in next st (Corner Textured Clam Shell partially made), SC in next SC, [DC in next two sts, 3 DC in next st, DC in next two sts (Side Textured Clam Shell made), SC in next SC] work until SC made in last SC on the side, DC in next st, 2 DC in next st, DC in next st (first side made).

*3 DC in next st, DC in next st, 2 DC in next st, DC in next st (Corner Textured Clam Shell made), SC in next SC, [DC in next two sts, 3 DC in next st, DC in next two sts (Side Textured Clam Shell made), SC in next SC] work until SC made in last SC on the side, DC in next st, 2 DC in next st, DC in next st* (second side made).

Rep sts btwn * * another two times (for third and fourth sides).

DC in first st (alongside StSC) (Corner Textured Clam Shell made), Sl St into StSC.

Optional Final Rnd

The Alternate Rep Rnd 2 has more rounded corners and may be preferred for the round that finishes the blanket.

Alternate Rep Rnd 2 – Rounded Textured Clam Shells

Note: All SCs in this round will be made in a SC from the previous round.

Turn to WS. (StSC, 2 DC) in first st, DC in next three sts (Corner Textured Clam Shell partially made), SC in next SC, [DC in next two sts, 3 DC in next st, DC in next two sts (Side Textured Clam Shell made), SC in next SC] until SC made in last SC on the side, DC in next three sts (first side made).

*5 DC in next st, DC in next three sts (Corner Textured Clam Shell made), SC in next SC, [DC in next two sts, 3 DC in next st, DC in next two sts (Side Textured Clam Shell made), SC in next SC] until SC made in last SC on the side, DC in next three sts* (second side made).

Rep sts btwn * * another two times (for third and fourth sides).

2 DC in first st (alongside StSC) (Corner Textured Clam Shell made), Sl St into StSC.

Finishing

Fasten off yarn.

Sew all ends securely to chosen WS of blanket.

Repeat Table

Notes:

[ ] column contains the total number of times the [ ] stitches should be worked.
The Side Shells count and SC count is for a single side.

Actl Rnd	Rep	Rep Rnd	[ ]	Side Shells	SC
2	1	1	N/A	N/A	1
3		2	N/A	N/A	1
4	2	1	N/A	1	2
5		2	N/A	1	2
6	3	1	N/A	2	3
7		2	2	2	3
8	4	1	2	3	4
9		2	3	3	4
10	5	1	3	4	5
11		2	4	4	5
12	6	1	4	5	6
13		2	5	5	6
14	7	1	5	6	7
15		2	6	6	7
16	8	1	6	7	8
17		2	7	7	8
18	9	1	7	8	9
19		2	8	8	9
20	10	1	8	9	10
21		2	9	9	10
22	11	1	9	10	11
23		2	10	10	11
24	12	1	10	11	12
25		2	11	11	12
26	13	1	11	12	13
27		2	12	12	13
28	14	1	12	13	14
29		2	13	13	14
30	15	1	13	14	15
31		2	14	14	15
32	16	1	14	15	16
33		2	15	15	16
34	17	1	15	16	17
35		2	16	16	17
36	18	1	16	17	18
37		2	17	17	18
38	19	1	17	18	19
39		2	18	18	19
40	20	1	18	19	20
41		2	19	19	20
42	21	1	19	20	21
43		2	20	20	21
44	22	1	20	21	22
45		2	21	21	22
46	23	1	21	22	23
47		2	22	22	23
48	24	1	22	23	24
49		2	23	23	24
50	25	1	23	24	25
51		2	24	24	25
52	26	1	24	25	26
53		2	25	25	26
54	27	1	25	26	27
55		2	26	26	27
56	28	1	26	27	28
57		2	27	27	28
58	29	1	27	28	29
59		2	28	28	29
60	30	1	28	29	30
61		2	29	29	30
62	31	1	29	30	31
63		2	30	30	31
64	32	1	30	31	32
65		2	31	31	32
Etc.	Etc.	Etc.	Etc.	Etc.	Etc.

Pattern Support

Available via thecrochetfix Facebook Community Group.

Pattern Versioning

Version	Date	Comments
0.1	01/05/2018	Initial draft.
0.2	08/11/2018	Published version.
1.0	20/04/2026	Pattern refresh.
1.1	06/05/2026	Tested version.

Tester Acknowledgements

Many thanks to:

Tania Barry – @shewgirlscrochetcreations on IG, shewgirl on Ravelry.
Skye – @skyebomonkey on IG, Skyebo on Ravelry.
Pauline Greaves – @libby_browns_basket on IG, LibbyBrownsBasket on Ravelry.
Iulia-Ramona Fülöp – @iuliashandmade on IG, Iuliashandmade on Ravelry.
Tina Woodhouse – @themanythingsivemade on IG.

Appendix A: Example Projects

For additional inspiration, refer to Ravelry projects.

Rainbow

Yarn: Carnival 8 Ply (DK/Cat. 3) acrylic in Rose Sorbet, Butterscotch, Mint and Violet shades, ~1000g/35Oz in total (~2 100g balls of Mint and Butterscotch, and ~2.25 100g balls of Rose Sorbet and Violet.)
Hook: 4mm/G/9.
Rnds: 59 rnds (29 reps).
Size: ~145cm/57in square (Throw size).
Colour Sequence: Colours changed after each rep, cycling through Rose Sorbet, Butterscotch, Mint and Violet.

Blue/Greens

Yarn: Carnival 8 Ply (DK/Cat. 3) acrylic in Petrol, Turquoise, Mint and White shades. ~1000g/35Oz in total (~2 100g balls of Petrol and Turquoise, and ~3 100g balls of Mint and White.)
Hook: 4mm/G/9.
Rnds: 63 (31 reps).
Size: ~170cm/67in square (large Throw size).
Colour Sequence: Colours cycled through Petrol, Turquoise, Mint and White, and changed after:

- Rep 1
- Rep 3
- Rep 5
- Rep 7
- Every rep from Rep 8 through to Rep 23
- Rep 25
- Rep 27
- Rep 29

Pattern PDF

Crochet For Charity Blog Hop 2026 - Day 26 Gift

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The pattern PDF for my Textured Clam Shells Blanket design is available for free using a coupon for 24 hours only – 10am 01 October 2026 to 10am 02 October 2026 (EST time).

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