Grainline Blanket Square works up from corner to corner, turning a straightforward bias construction into a bold diagonal fabric that makes every colorway pop. A beginner-friendly crochet block, it is the perfect starting point for a scrappy stash-busting throw or a sampler blanket built one square at a time.

Construction and technique

• Bias (corner-to-corner) construction: worked diagonally, increasing to the midpoint then decreasing to form a crisp, even square
• Stripe-ready structure: clean color changes suit single-skein stripes, scrappy multi-color sequences, or a solid tone-on-tone block
• Crocheted edging: a finishing round unifies each block and preps it for joining to neighboring squares
• Seamless joining: blocks connect without sewing for easy modular blanket assembly

Materials

• Yarn: worsted weight (CYC 4), such as Berroco Vintage® (a wool/acrylic blend with excellent stitch definition and machine-washable care)
• Yardage: 85-90 yards per square
• Hook: US J-10 / 6 mm
• Gauge: 13 sts and 11 rows per 4 in in pattern
• Notions: yarn needle for weaving ends

Sizing

• One size: finished square dimensions given in pattern
• Repeat and join blocks in any grid arrangement to reach your target blanket size

What’s included

• Written crochet instructions in English
• Row-by-row stitch counts
• Color change notes for clean stripe transitions
• Tips for joining blocks into a finished throw

With just 85-90 yards per square, Grainline is a natural stash buster and a satisfying quick make. Each block works up in a single sitting, making it an ideal project for crafting nights, travel, or building gift-worthy components one diagonal stripe at a time.

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