Spiral Circle to Square

Spiral Circle to Square 12" Afghan Block by Julie Yeager

What is Being Made

The Spiral Circle to Square is a 12-inch crochet afghan block designed by Julie Yeager. This intermediate-level project creates a decorative square block that begins with a circular spiral construction and transforms into a square shape, making it an ideal component for larger blanket or afghan projects. The finished block measures 12 inches and can be used individually or combined with other blocks to create larger textile pieces.

Crochet Techniques Used

This pattern employs several fundamental and intermediate crochet techniques to achieve its distinctive spiral-to-square design. The project begins with a foundational ring structure, either using a traditional slip knot with chain stitches or an optional Magic Ring method for a seamless center. The pattern utilizes color changes and multi-color construction, with yarn being joined using a specialized single crochet join technique that creates clean transitions between colors. Split-ring markers are used throughout to track stitch placement and round endings, which is essential for maintaining pattern accuracy in this geometric design.

Stitches Used

The Spiral Circle to Square block incorporates the following crochet stitches:

• Single Crochet (SC): Used as the primary join stitch when introducing new colors and as a foundational stitch in the pattern construction
• Half Double Crochet (HDC): Employed to build height and texture in the spiral rounds
• Double Crochet (DC): Provides additional height and helps create the expanding circular-to-square transition
• Slip Stitch: Used for joining rounds and securing stitches
• Chain Stitch (CH): Forms the initial foundation of the pattern

Materials and Tools

This pattern is designed to work with worsted weight yarn, specifically Vanna's Choice brand in four coordinating colors. The suggested yarn quantities are approximately 20 grams per color, allowing for economical use of yarn scraps or stash yarn. The recommended hook size is Size I (5.5 mm), which pairs appropriately with worsted weight yarn to create a fabric with good drape and definition. Four split-ring markers are required to track stitches and round endings throughout the construction process, making them essential tools for successful pattern completion.

Pattern Notes

The pattern uses American crochet terminology, making it accessible to crocheters familiar with standard American abbreviations and stitch definitions. The color sequence follows a four-color rotation using colors labeled A (Black), B (White), C (Aqua), and D (Radiant Lime), creating a vibrant, multi-colored finished block. The pattern includes a special join technique for seamlessly introducing new colors, which contributes to the professional appearance of the color transitions. This downloadable PDF pattern is offered free of charge by independent designer Julie Yeager, making it an accessible project for crocheters looking to expand their skill set at the intermediate level.