The perfect square to combine with 5" charm squares that finish 4 1/2". Great to use in 9" finished block designs. View the GO! Mix & Match Quilt Block Collection Chart which shows how the GO! Hip to Be Square dies can be combined together and with existing GO! dies to create classic 6", 8", 9" or 12" 4-patch and 9-patch blocks. Compatible with Go!, Go! Baby, Go! Big, and Studio* cutters. *Requires Go! Die Adapter