It just got faster to cut your quilting pieces. Sizzix Bigz Pro dies are the largest dies on the market. They will cut hundreds of thick materials, including fabric. Use it to cut your quilting pieces or use it on any other crafting project. The options are endless! This die will cut four Half-Square Triangles. This shape has dog-eared corners that make it easy to align the triangles for sewing. When two triangles are finished into a square, the finished square measures 5 1/2" x 5 1/2". This die measures 12" x 12 3/4" overall and must be used in the Big Shot Pro machine. A Big Shot Pro Cutting Pad and Big Shot Pro Crease Pad are also required. All items are sold separately.