Prism Square: 12-Inch Geometric Overlay Mosaic Crochet Pattern

Prism Square is a printable overlay mosaic crochet pattern for crocheters who enjoy modern geometric designs and rhythmic, repetitive stitching. This PDF crochet pattern includes both a traditional mosaic crochet chart and complete written instructions, making it suitable for anyone looking for a 12-inch crochet square pattern for blankets, pillows, bags, garments, and other modular crochet projects.

Create a striking geometric crochet square with Prism, an overlay mosaic crochet pattern built around a repeating angular motif. Worked in the round from the center outward, the design gradually unfolds as you crochet, creating a relaxing and almost meditative stitching experience. The consistent rhythm of the pattern lets you settle into the process and watch the geometric design emerge row by row.

The finished square measures approximately 12 × 12 inches (30 × 30 cm) after blocking, making it ideal for blankets, cushions, bags, garments, wall hangings, and other modular crochet projects. The consistent size also makes it easy to combine with other squares in your crochet collection.

This listing is for a digital PDF crochet pattern only. No physical item will be shipped. Your files will be available for instant download immediately after purchase.

Finished Size

• Approximately 12 × 12 inches (30 × 30 cm) after blocking
• Final stitch count: 59 stitches per side

Materials

• Yarn: YarnArt Jeans (Sport Weight #2)
• Fiber content: 55% cotton, 45% acrylic
• Skein size: 50 g / 160 m (174 yds)
• Approximately 83 m (91 yds) / 25 g (0.88 oz) of the dark color
• Approximately 117 m (128 yds) / 35 g (1.23 oz) of the light color
• 3.5 mm (E-4) crochet hook

Gauge

20 stitches × 18 rows = 4 × 4 inches (10 × 10 cm) in overlay mosaic crochet.

Gauge is not critical for this pattern, but it will affect the finished size and yarn usage.

Skill Level

Easy

Basic familiarity with overlay mosaic crochet is helpful, but the pattern begins with a clear introduction explaining the construction used throughout the design.

The PDF Pattern Includes

• A printable PDF pattern
• A short introduction explaining the overlay mosaic crochet construction, including how to start and finish the rounds, switch colors, and other essential techniques
• A traditional overlay mosaic crochet chart showing the repeating geometric section together with corner instructions
• Complete row-by-row written instructions for crocheters who prefer written patterns instead of charts
• Designer contact information in case you have questions or would like to share your finished project

A Designer's Tip

One of the secrets to beautiful overlay mosaic crochet is color contrast. Pairing a light yarn with a dark one helps the repeating Prism motif stand out and makes the geometric details easier to see.

The design is also a great opportunity to experiment with color. Try bold contrasting shades for a crisp graphic effect, or use a gradient palette for a softer interpretation while keeping enough contrast between the colors to define the mosaic stitches.

Part of the Echo Squares Collection

Prism Square is part of the Echo Squares Collection, a series of geometric 12-inch overlay mosaic crochet squares created around satisfying repetition, consistent construction, and a relaxing crochet rhythm. Mix and match the designs to create blankets, cushions, bags, garments, and other modular crochet projects while maintaining a uniform finished size.

Looking for even more variety? Explore the Year Squares Collection, featuring twelve 12-inch crochet squares in different crochet techniques, textures, and stitch patterns that can also be combined into larger projects.

Pattern Details

• Project Type: Crochet Square Pattern
• Craft: Crochet
• Technique: Overlay Mosaic Crochet
• Format: Digital PDF Download
• Theme: Geometric, Modern, Meditative
• Brand: ItWasYarn
• Designer: Kate Veselunka
• Pattern: Prism Square
• Collection: Echo Squares Collection
• Year Designed: 2026
• Finished Size: 12 × 12 inches (30 × 30 cm)
• Yarn Weight: Sport (#2)
• Recommended Yarn: YarnArt Jeans
• Color Count: 2
• Language: English
• Crochet Terminology: US Terms

Usage Rights

This pattern is intended for personal use only. It may not be copied, redistributed, translated, shared, or resold in any format, printed or digital. You are welcome to sell finished items that you personally make using this pattern. Designer credit is always appreciated.

Please Note

This listing is for a digital crochet pattern, not a finished crochet square or any physical product. Because this is an instant digital download, refunds and exchanges cannot be offered after purchase.

If you share your finished project online, I'd love to see it. Please tag @itwasyarn.

Happy crocheting!