Paired-Cluster Granny Square Blanket

A traditional throw of 10 cm granny squares. Each square is worked in closed clusters, with a pair of clusters in every corner. Squares are joined with whip stitch or join-as-you-go. An optional border echoes the paired-cluster corners.

Skill level: Intermediate

Terminology: UK crochet terms throughout. (UK tr = US dc; UK dc = US sc; UK htr = US hdc; UK dtr = US tr.)

Finished measurements

One square (blocked): 10 × 10 cm (4 × 4 in)

Blanket, 10 × 12 squares, before border: 100 × 120 cm (39½ × 47¼ in)

Blanket with optional border: 110 × 130 cm (43¼ × 51¼ in)

Materials

• Yarn: Worsted weight (aran), approximately 2200 m (2405 yds) total.
  • Allow about 16–18 m per square (120 squares ≈ 2000 m) plus 200 m for joining and the optional border.
  • Example: 11 balls of 100 g / 200 m.
  • Colour plan A (recommended): mixed contrast colours for Rounds 1–4 of each square, plus a main colour (MC) for Round 5, joining, and border (about 1400 m contrast + 800 m MC).
  • Colour plan B: each square in one solid colour; join and border in MC or in matching colours.
• Hook: 5 mm crochet hook (UK 6 / US H-8), or size needed to obtain tension
• Tapestry needle
• Scissors
• Tape measure
• Blocking board and rust-proof pins

Tension (gauge)

One blocked square measures 10 × 10 cm (4 × 4 in) after 5 rounds.

Work a trial square and block it. If the square is smaller than 10 cm, change to a 5.5 mm hook. If larger, change to a 4.5 mm hook. Do not skip blocking — cluster corners pull in until they are pinned out.

Abbreviations

Special stitches

3-treble cluster (cl): (Yrh, insert hook in indicated st or sp, yrh, pull up a loop, yrh, draw through 2 loops) 3 times (4 loops on hook), yrh, draw through all 4 loops on hook.

Beginning cluster (beg cl): Ch 3, (yrh, insert hook in same sp, yrh, pull up a loop, yrh, draw through 2 loops) twice (3 loops on hook), yrh, draw through all 3 loops on hook.

The beg cl counts as one cluster.

Pattern notes

• Work with RS facing unless a joining method says otherwise.
• Join each round with a sl st in the top of the beg cl, unless using join-as-you-go on Round 5.
• After joining a round, slip-stitch into the next corner space to start the following round (do not work into the body of the first cluster).
• All clusters, except those in the starting ring, are worked into chain spaces, not into the chain stitches themselves.
• Corner instruction (cl, ch 2, cl) is the paired-cluster corner; keep that ch 2 consistent so the pairs remain distinct.
• Weave in ends as you go if you are changing colour; cluster squares have many short tails.

Square

Make 120.

Foundation: Make a magic ring.
(Alternative: ch 4, sl st in first ch to form a ring.)

Round 1: Beg cl in ring, ch 3, (cl in ring, ch 3) 3 times, sl st in top of beg cl.
4 clusters, 4 ch-3 sps. (4 clusters ✓)

Pull the magic ring closed.

Round 2: Sl st into first ch-3 sp, (beg cl, ch 2, cl) in same sp, ch 3, *(cl, ch 2, cl) in next ch-3 sp, ch 3; rep from * twice more, sl st in top of beg cl.
8 clusters in 4 corner pairs, 4 ch-2 corner sps, 4 ch-3 sps. (4 pairs × 2 = 8 clusters ✓)

Round 3: Sl st into first ch-2 corner sp, (beg cl, ch 2, cl) in same sp, ch 3, cl in next ch-3 sp, ch 3, *(cl, ch 2, cl) in next ch-2 corner sp, ch 3, cl in next ch-3 sp, ch 3; rep from * twice more, sl st in top of beg cl.
8 corner clusters + 4 side clusters = 12 clusters ✓. 4 ch-2 corner sps, 8 ch-3 sps (2 per side).

Round 4: Sl st into first ch-2 corner sp, (beg cl, ch 2, cl) in same sp, ch 3, (cl in next ch-3 sp, ch 3) twice, *(cl, ch 2, cl) in next ch-2 corner sp, ch 3, (cl in next ch-3 sp, ch 3) twice; rep from * twice more, sl st in top of beg cl.
8 corner clusters + 8 side clusters = 16 clusters ✓. 4 ch-2 corner sps, 12 ch-3 sps (3 per side).

Round 5 (worked plain if you will whip-stitch; see Join-as-you-go if using that method): Sl st into first ch-2 corner sp, (beg cl, ch 2, cl) in same sp, ch 3, (cl in next ch-3 sp, ch 3) 3 times, *(cl, ch 2, cl) in next ch-2 corner sp, ch 3, (cl in next ch-3 sp, ch 3) 3 times; rep from * twice more, sl st in top of beg cl. Fasten off.
8 corner clusters + 12 side clusters = 20 clusters ✓. 4 ch-2 corner sps, 16 ch-3 sps (4 per side).

Square checkpoint: Each side reads as a corner cluster, four ch-3 spaces with three side clusters between them, and a corner cluster. Four sides match. Block to 10 × 10 cm (4 × 4 in).

Making the squares

Work 120 squares. For Colour plan A, change to MC at the start of Round 5 (join MC in any corner ch-2 space and work the beg cl). For Colour plan B, work all five rounds in the square’s colour.

Suggested layout: 10 squares wide × 12 squares long. Arrange on a flat surface before joining. A random mix of colours reads as a classic scrap granny; repeating a stripe of the same colour across each row gives a calmer throw.

Joining

Use one of the following methods.

Method 1: Whip stitch (squares completed through Round 5)

1. Block every square to 10 × 10 cm (4 × 4 in).
2. Weave in remaining ends.
3. Arrange 12 rows of 10 squares, RS up, with paired-cluster corners aligned.
4. With MC (or matching yarn) and a tapestry needle, place two neighbouring squares WS together. Whip-stitch through the back loops only of corresponding stitches along the shared edge: one stitch in each cluster, two or three stitches across each ch-3, and two stitches in each corner ch-2 so the paired corners sit flat.
5. Join squares into strips of 10, then join the 12 strips along their long edges.
6. Keep seam tension even — a tight seam will shrink the 100 × 120 cm (39½ × 47¼ in) fabric.

Method 2: Join-as-you-go (on Round 5)

Work the first square of the blanket through Round 5 exactly as written and fasten off.

Every later square is joined on Round 5 to the square(s) already in place. Hold the new square against the completed square(s), RS facing you.

Joining one side (next square in the same row, or the first square of a new row joining only to the square below):

Work Round 5 as written until you reach the side (or sides) that must be joined. On a joining side:

• Side spaces: instead of ch 3 between clusters, work ch 1, sl st in the corresponding ch-3 sp of the adjacent square, ch 1, then work the next cluster in the new square.
• Corner on a joining side: instead of (cl, ch 2, cl), work (cl, ch 1, sl st in the adjacent square’s corner ch-2 sp, ch 1, cl).

Continue any unjoined sides with the usual ch 3 and (cl, ch 2, cl) corners. Join and fasten off.

Joining two sides (a square that has neighbours on the left and below):

Work Round 5, joining the first side as above. At the corner where three squares already meet:

• Work cl in the new square’s corner sp, ch 1, sl st in the existing three-square corner join, ch 1, cl in the same new corner sp.

Then join the second side in the same way as a single-side join. Complete remaining sides without joining.

Alignment check: Each new side cluster should sit opposite a ch-3 of the neighbouring square, and each paired corner should sit in the same corner space. If a pair lands on a side space, undo that side of Round 5 and match the spaces again.

Optional border

Adds about 5 cm (2 in) on each side. With RS facing, join MC in any outer corner ch-2 sp of the assembled blanket.

Border round 1: Ch 1 (does not count as a st), *(1 dc, ch 2, 1 dc) in corner ch-2 sp, 1 dc in each cluster, 2 dc in each ch-3 sp, and 1 dc in each join between squares; rep from * along all four sides, working the (1 dc, ch 2, 1 dc) corner in each of the four blanket corners. Sl st in first dc.

Border round 2 (paired-cluster echo): Sl st into corner ch-2 sp, (beg cl, ch 2, cl) in same sp, ch 2, skip 2 dc, *cl in next dc, ch 2, skip 2 dc; rep from * to next blanket corner, adjusting by skipping 1 dc or 3 dc once per side if needed so a corner pair lands in the corner ch-2, then work (cl, ch 2, cl) in that corner ch-2, ch 2, skip 2 dc; continue in this way around. Sl st in top of beg cl.
Each blanket corner is a pair of clusters (cl, ch 2, cl) ✓.

Border round 3: Ch 1, 1 dc in each cluster, 2 dc in each ch-2 sp along the sides, and (1 dc, ch 2, 1 dc) in each corner ch-2. Sl st in first dc. Fasten off.

If a side of Round 2 is slightly short or long, skip one fewer or one more dc on that side only — never skip a corner pair.

Finishing

Weave in all remaining ends on the WS.

Block the finished blanket to 100 × 120 cm (39½ × 47¼ in) without border, or 110 × 130 cm (43¼ × 51¼ in) with border. Pin out each outer paired-cluster corner so the edge is square. Wet-block (soak in lukewarm water, press out water in a towel, pin to measurements, dry flat) unless the yarn ball-band requires steam blocking only.

Care

Follow the ball-band for the yarn you used. Acrylic may be machine-washed on a gentle cycle and laid flat to dry. Wool and wool blends should be washed by hand in cool water and dried flat.

Stitch-count summary (one square)

Round 1: 4 ✓ · Round 2: 8 ✓ · Round 3: 8 + 4 = 12 ✓ · Round 4: 8 + 8 = 16 ✓ · Round 5: 8 + 12 = 20 ✓

Blanket: 10 × 12 = 120 squares ✓ · 10 × 10 cm = 100 cm wide ✓ · 12 × 10 cm = 120 cm long ✓ · Border +5 cm each side → 110 × 130 cm ✓