Octagon Baby Blanket in Caron Simply Soft - Downloadable PDF

Octagon Baby Blanket in Caron Simply Soft – Crochet Pattern Summary

Designed by Marilyn Losee, the Octagon Baby Blanket is a beautifully structured crochet blanket worked in the round from the center outward, creating a striking octagonal shape. This intermediate-level crochet pattern is available as a free downloadable PDF and produces a finished blanket with a diameter of 41 inches (104 cm) — a generous size that makes it ideal as a gift blanket, a stroller cover, or a decorative nursery throw.

What Is Being Made

This pattern produces a single large octagonal baby blanket worked entirely in the round. The octagon shape is achieved by dividing each round into eight equal sections, with increases and occasional decreases strategically placed at corner chain-spaces to maintain the flat, structured geometry of the fabric. The result is a medallion-style blanket with a clean, symmetrical silhouette and a soft, colorful striped appearance created by changing yarn colors across rounds.

Techniques Used

• Working in the round – The blanket begins with a simple chain ring and grows outward round by round, a technique common in medallion and granny-square style crochet.
• Corner increases – Each of the eight corners is formed by working a (dc, ch 2, dc) combination into a chain-space, creating the angled edges that define the octagon shape.
• Shaping with decreases – To prevent the blanket from flaring or ruffling, select rounds incorporate decreases (dc2tog and hdc2tog) that balance out the corner increases and keep the fabric lying flat.
• Color changes between rounds – Five different yarn colors are introduced across the rounds, requiring yarn joins and fastening off, which adds a colorwork element to the construction.
• Foundation ring start – The blanket opens with a chain-5 ring joined with a slip stitch, a classic center-start technique for circular and polygonal crochet motifs.

Stitches Used

• Chain (ch) – Used for the foundation ring, turning chains, and corner chain-spaces throughout.
• Slip stitch (sl st) – Used to join rounds and to attach new yarn colors at the start of each color section.
• Single crochet (sc) – Used in the very first round to establish the initial stitch count in the center ring.
• Half double crochet (hdc) – Appears in decrease combinations (hdc2tog) used in shaping rounds.
• Double crochet (dc) – The primary stitch of the blanket, used in the vast majority of rounds to build the fabric and create the grouped stitch sections between corners.
• dc2tog (double crochet two together) – A standard decrease stitch worked by drawing up loops in two consecutive stitches and completing them together, used to control the stitch count in specific rounds.
• hdc2tog (half double crochet two together) – A decrease stitch similar to dc2tog but worked at the half double crochet height, also used for shaping.

Construction and Structure

Each round of the blanket is organized into eight groups of double crochet stitches, one group per side of the octagon, separated by corner chain-spaces. In most rounds, the corner chain-spaces receive increase stitches to widen the blanket, while occasional decrease rounds keep the stitch count controlled and the fabric smooth and flat. This careful balance of increases and decreases is what gives the blanket its precise octagonal geometry rather than a circular or ruffled shape.

The blanket begins with just 8 single crochet stitches in the center ring, grows to 16 double crochet in Round 2, and then establishes the eight-section structure in Round 3 with eight groups of three double crochet stitches separated by chain-1 spaces. From Round 4 onward, the corner chain-2 spaces define the octagon's eight corners, and the blanket expands steadily with each subsequent round.

Materials

The pattern calls for Caron Simply Soft yarn, a smooth, aran