To make custom-sized blocks, do the Folding Paper technique. First cut your desired size block from paper. Do you want 12 petals? 4 x 3 = 12. Fold your paper square into quarters. This determines your centerpoint. Determine the desired size of your plate, then using a compass or a dinner plate, draw two circles, your outer maximum dimension, and a small circle for your center. Then cut one quarter, and fold it diagonally into 3 equal radial sections. The 90 degree angle divided by 3 equals a 30 degree angle. Each section will have the proper angle to make a perfect circle when 12 are connected. At this time decide if you want rounded, or pointed, or a combination of both. Cut your paper template, Add quarter inch seam allowances on all sides. You may want to cut another full size paper block, drawing in your center circle, tracing your 30 degree angle template, so you can visualize your block. Follow this technique to create 16 segments, or 20, etc. Good Luck.