*The sale price and retail price are the same due to the manufacturer's regulated pricing. Create 3 inch or 6 inch Square on Square blocks. No calculation needed - all the cutting measurements are printed right on the tool! Trimming each round as triangles are added creates perfectly square, uniform blocks. The popular Snail's Trail block is now easier than ever - simply change the colors of the triangles! For more Creative Grids Rulers with FREE SHIPPING click on the link.