Cut perfect quilting triangles quickly and easily with this die by Sizzix. This Bigz Pro die cuts 6 1/2" x 6 1/2" Half-Square Triangles. To make alignment easier, these triangles have dog-eared corners. Bigz Pro dies are strong and sturdy. They will cut through fabric or any other thick material. It works with chipboard, magnet, leather, even sandpaper (in limited use) and so much more. These dies are the biggest ones on the market. They measure 12" x 12 3/4". They can only be used with the Big Shot Pro machine and also requires the use of a Big Shot Pro Cutting Pad and Big Shot Pro Crease Pad (sold separately). Your material should measure 12" x 12". Please note that this design may be angled. Align materials with designs or stripes with the cutting blades, not the edge of the die, for best results.