Instructions for 3 sizes. The small uses the Itty BittyPrimitive Pinwheel Tool and is 20in x 22in. Medium uses thePrimitive Pinwheel Tool and is 32in x 35-1/2in. Large usesLil' Twister and is 52-1/2in x 58-1/2in. The two smallersizes use a technique to add dimension to your quilt.