here are ten different sizes ranging from 2-1/4in to 4-1/2in and they are made from heat resistant plastic so you can use them with an iron. There are two of each size in the package. These bigger sizes are great for the center of a Mariner’s Compass block, Drunkard’s Patch blocks, traditional appliqué and so much more. Included: 20 Circles Sizes Included: 2 of each of, 2-1/4in, 2-1/2in, 2-3/4in, 3in, 3-1/4in, 3-1/2in, 3-3/4in, 4in, 4-1/4in, 4-1/2in