Basic Ruler Instructions for WonderArc

The WonderArc ruler allows you to cut template-free circles from fabric squares using a rotary cutter. Circle sizes are 3”, 3½”, 4”, 4½”, 5”, 5½”, 6” 6½”, 7”, 7½”, 8”, and 8½”.

Easily Cut Circles from Squares:

First determine the size of circle. Squares will be cut the same size as desired circle. Example: a 5” circle will be cut from a 5” square of fabric.

 

  1) Cut squares:

  2) Fold squares in half. Press with an iron. Fold in half again. Press again.

 

  3) Line up folded edges of squares with solid lines (Fig. 1) for whole circles.

Using a 28mm rotary cutter and mat, hug the inside edge of the arc as the rotary cutter begins to cut. Cut slowly until the curve becomes familiar. (Fig. 1)

The dashed lines are used for adding seam allowances to rectangles or other shapes. See your pattern or the website for further instructions.

Be Aware of Sharp Edges, Not Recommended for Children

Be responsible when handling the ruler. The WonderArc and Big Arc rulers will bend and break under pressure when placed on/in an uneven surface. WonderArc Designs is not responsible for breakage.