7 clear acrylic templates. The templates in Set B are based on a 4" (10 cm) finished square and its most common component parts. Some of the pieces can be used with 2-1/2 inch strips, like Jelly Rolls. 7 clear acrylic pieces. Template Set D includes the same shapes at sizes that complement Set B. So if you own Sets A and C, or Sets B and D, you will love Volume 2 of the Encyclopedia of Patchwork Blocks, with approximately 80 block designs in over 200 block sizes from which to choose.