Free Modern Granny Stripe Blanket Pattern (7 Sizes)

This free modern granny stripe blanket pattern takes the nostalgic 3-double-crochet cluster rhythm of a traditional granny square and works it in flat, back-and-forth rows with crisp, straight edges. By starting with a solid single crochet foundation row—a technique popularized by Lucy of Attic24 and Purl Soho's Granny Stripe Blanket—the bottom edge lies completely flat instead of dipping between clusters. Below you will find the exact Multiple of 3 + 2 starting chain formula, a 7-size chart from Baby Lovey to Queen, and step-by-step instructions for DK (#3) and Worsted (#4) yarn.

Terminology note: This pattern is written in standard US crochet terms. In UK crochet terminology, a US double crochet (dc) is called a treble crochet (tr), and a US single crochet (sc) is called a double crochet (dc).

Understanding the Granny Stripe Stitch Multiple (Multiple of 3 + 2)

Once you complete the solid setup row, every row of the granny stripe is worked entirely into the spaces between 3-dc clusters rather than into the top loops of individual stitches.

Here is how the Multiple of 3 + 2 arithmetic works on a sample 14-chain setup (3 × 4 + 2 = 14 chains):

1. Foundation Chain (14 ch): Chain any multiple of 3, plus 2 extra chains.
2. Row 1 (Solid Base Row — 13 sc): Work 1 sc in the 2nd chain from the hook and in each chain across. You now have 13 single crochets (3 × 4 + 1 = 13 sts).
3. Row 2 (Full-Cluster Edge Row — 4 clusters + 2 edge dc):
   • Ch 3 (counts as 1 dc on the right edge) and work 1 dc into the very first stitch (or work 3 dc in the first space depending on the edge style; in our straight-edge method below, ch 3 counts as the edge stitch, skip 1 st, then work 3 dc into the next st, *skip 2 sts, 3 dc in next st* across, skip 1 st, 1 dc in the final stitch).
   • That places 4 full 3-dc clusters across the interior, framed by 1 dc at each side edge (4 × 3 + 2 = 14 dc total).
4. Row 3 (Half-Cluster Edge Row — 3 full clusters + two 2-dc edge clusters):
   • To stagger the clusters like brickwork so the side edges stay ruler-straight, Row 3 begins with ch 3, 1 dc in the first space between the edge stitch and the first cluster (a 2-dc half-cluster), works 3 dc into each space between clusters across the center, and ends with 2 dc in the final space before the turning chain.

Master Blanket Sizing, Starting Chain & Yardage Chart (7 Sizes)

Every starting chain below is pre-calculated to an exact Multiple of 3 + 2. If you want to customize the width or length for a different yarn gauge, use our blanket size tool.

Gauge & Arithmetic Check

• Option A (DK #3 on 4.5 mm US 7 hook): Target gauge is 6 clusters (18 dc) × 9.2 rows = 4 × 4 in (10 × 10 cm) (4.5 sts/in; 2.3 rows/in) (estimate).
  • Standard Throw (50 in wide): $50 ext{ in} imes 4.5 ext{ sts/in} = 225 ext{ sts}$. Nearest multiple of $3 + 2$ is $ ext{Ch } 227$ ($3 imes 75 + 2 = 227$).
• Option B (Worsted #4 on 5.0 mm US H-8 hook): Target gauge is 5 clusters (15 dc) × 8 rows = 4 × 4 in (10 × 10 cm) (3.75 sts/in; 2.0 rows/in) (estimate).
  • Standard Throw (50 in wide): $50 ext{ in} imes 3.75 ext{ sts/in} = 187.5 ext{ sts}$. Nearest multiple of $3 + 2$ is $ ext{Ch } 188$ ($3 imes 62 + 2 = 188$).

Materials, Hooks & Abbreviations

• Yarn:
  • Option A: CYC #3 Light / DK weight acrylic, cotton-blend, or superwash merino wool in 5 coordinating colors.
  • Option B: CYC #4 Medium / Worsted weight acrylic, cotton-blend, or wool-blend yarn in 5 coordinating colors.
• Crochet Hook:
  • Option A (DK #3): 4.5 mm (US 7) hook, plus a 5.0 mm (US H-8) hook for the starting chain.
  • Option B (Worsted #4): 5.0 mm (US H-8) hook, plus a 5.5 mm (US I-9) hook for the starting chain.
• Abbreviations (US Terms):
  • ch: chain
  • sc: single crochet (UK double crochet — dc)
  • dc: double crochet (UK treble crochet — tr)
  • sp: space between 3-dc clusters
  • st(s): stitch(es)

Complete Written Pattern: The Modern Granny Stripe Blanket

Setup: Foundation Chain & Row 1 (Solid Single Crochet Base)

• Using a hook 0.5 mm larger than your main body hook (so the bottom edge does not pull tight), chain the number listed in the chart for your size (any Multiple of 3 + 2; for a practice swatch, Ch 20).
• Row 1 (RS): Switch to your main hook. Work 1 sc into the 2nd chain from the hook and into each chain across. Turn.
  • Swatch Stitch Count: 19 sc (3 × 6 + 1 = 19).

The Two-Row Granny Stripe Repeat (Rows 2 and 3)

Row 2 (Full-Cluster Row — WS):

• Ch 3 (counts as 1 dc here and throughout).
• Skip the very first stitch at the base of the ch 3 and skip the next stitch; work 3 dc into the 3rd stitch.
• *Skip the next 2 stitches, work 3 dc into the next stitch*; repeat from * to * across until 2 stitches remain.
• Skip the next stitch, and work 1 dc into the final stitch of the row. Turn.
• Swatch Count: 6 full 3-dc clusters + two 1-dc edge stitches (6 × 3 + 2 = 20 dc).

Row 3 (Half-Cluster Staggered Row — RS):

• Ch 3 (counts as 1 dc), and work 1 dc into the very first space between the edge dc and the first 3-dc cluster below (this ch 3 + 1 dc forms a 2-dc half-cluster at the right edge).
• *Skip the next 3-dc cluster, and work 3 dc into the space before the next cluster*; repeat from * to * across until you reach the last cluster.
• Skip the last 3-dc cluster, and work 2 dc into the final space between the last cluster and the ch 3 turning chain (work 1 dc into the space and 1 dc into the top of the ch 3 turning chain for the crispest edge). Turn.
• Swatch Count: 5 full 3-dc clusters + two 2-dc edge half-clusters (5 × 3 + 4 = 19 dc).

Row 4 (Full-Cluster Row on Spaces — WS):

• Ch 3 (counts as 1 dc).
• Skip the first 2-dc half-cluster, and work 3 dc into the space between the half-cluster and the next 3-dc cluster.
• *Skip the next 3-dc cluster, and work 3 dc into the next space between clusters*; repeat from * to * across to the final 2-dc half-cluster.
• Skip the first dc of the final half-cluster, and work 1 dc into the top of the ch 3 turning chain. Turn.

Remaining Rows:

• Repeat Rows 3 and 4 until your blanket reaches your target row count. Change colors every 2 rows for classic granny stripes, or use our stripe calculator to generate a random, Fibonacci, or ombré stripe sequence.

How to Change Colors Seamlessly with Standing Double Crochet Joins

When you change colors at the end of a row, you have two clean options:

1. Final Pull-Through Method: On the final dc of the old color row, work the stitch until 2 loops remain on the hook, yarn over with the new color, pull through the last 2 loops, and ch 3 to turn.
2. Standing Double Crochet Method: Fasten off the old color completely, turn your work, place a slip knot of the new color on your hook, and work a standing dc joins stitch directly into the first stitch or space—eliminating the visible ch 3 turning chain altogether.

3 Curated 5-Color Granny Stripe Palettes

To keep a multi-color granny stripe blanket looking cohesive rather than busy, build a 5-color palette that includes one light neutral (Cream, Ivory, or Oat), one deep anchor shade (Espresso, Navy, or Forest), and three mid-tone accent shades:

1. Warm Desert: Terracotta, Ochre Gold, Sage Green, Warm Cream, and Deep Espresso.
2. Coastal Mist: Deep Navy, Dusty Blue, Seafoam Green, Warm Sand, and Soft Ivory.
3. Modern Botanical: Forest Green, Olive, Dusty Blush, Rust Orange, and Heathered Oat.

Adding a Crisp Linen Stitch (Moss Stitch) Border

Because every granny stripe row ends with a double crochet post, a 3-round Linen Stitch (Moss Stitch) border (*1 sc, ch 1, skip 1*) frames the colorful clusters cleanly without ruffling:

• Round 1: With your neutral border color, work (1 sc, ch 2, 1 sc) in each corner, *1 sc, ch 1, skip 1 st* across the top and bottom edges, and 2 sc per double crochet row end (1 sc, ch 1 per row) along the two side edges.
• Rounds 2–3: Work 1 sc, ch 1 into every ch-1 space around, working (1 sc, ch 2, 1 sc) into each ch-2 corner space.

Common Mistakes & Troubleshooting

1. The Side Edges Indent Inward Every Other Row (Sawtooth Edges)

• Cause: Forgetting to alternate between 1 edge dc on even rows (Row 2 / Row 4) and a 2-dc half-cluster (ch 3, 1 dc in first space) on odd rows (Row 3).
• Fix: Check the start of your row before you begin: if the row below starts with a full 3-dc cluster right next to the edge stitch, your current row must start with a 2-dc half-cluster (ch 3, 1 dc in the first space).

2. The Bottom Edge Pulls Tighter Than the Blanket Body

• Cause: Foundation chains and single crochet rows have less horizontal stretch than 3-dc cluster rows.
• Fix: Always work your starting chain with a hook 0.5 mm to 1.0 mm larger than your main blanket hook, or start with Foundation Single Crochet (fsc).

Frequently Asked Questions