These quilt rulers are thick and sturdy, so they will stand up to years of wear. This 2 piece set makes it easy to make triangles within squares and divided rectangles.Details:ClearDurable constructionContents:6" x 6.75" x 6.75" triangle ruler (1/4" seam allowance)6.5" x 3" x 6" rectangle ruler (1/4" seam allowance)Instruction booklet