The Ideas C3895 9 1/2 x 9 1/2'' square patchwork ruler is the essential large-size inch template for checking and squaring finished quilt blocks. Made of reinforced 9.5 x 9.5 inch clear acrylic with straight edges for rotary cutter support, it features cross and 45º diagonal grid lines. Its wide format allows you to cut perfect squares and level the edges of the blocks before joining them to form the quilt. It is an indispensable ruler for patchwork practitioners who work with American patterns and seek absolute symmetry in the final assembly.