16 round mat has a grid marked at every 1/4 and a 10 square for squaring fabric. The mat has Martelli's no slip material on the back. Round cutting
Martelli MCM-30-60 Extra Large 30x60 Heavy Duty Cutting Mat at
Martelli
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Martelli Minute: 26 x 38 Cutting Mat
Martelli Quilting Supplies
Martelli Quilting Supplies
Martelli Extra Small Color Contrasting 12 x 18 Cutting Mat
Martelli Round-About 2-piece 17″ Cutting Mat with Base
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Martelli Round-about Cutting Mat A Modern Quilter's Review – Shannon Fraser Designs