Description 20 mm cotton spun balls are ideal for using to make medium paper flower centers.  These come in a pack of 24.  They are made of spun unbleached paper.  Each ball is approximately 20 mm in size and has a single hole in one end which is then perfect for a wire flower stem.  You can then cover these 20 mm cotton spun balls in crepe paper or tissue, paint them or color them with markers and then create the center you desire.  It’s a versatile craft supply, made of all-natural materials. NEED A DIFFERENT SIZE? Check out the cotton spun balls that come in smaller and larger sizes for your other smaller and larger flower centers!  We have paper balls in sizes 6mm, 10mm, 12mm, 15mm, 20mm, and 30mm for your crepe paper flowers. FIND MORE FLOWERS Want more easy paper flowers you can make at home? Browse all of our paper flower kits. JOIN OUR CRAFTING COMMUNITY Want to be part of a community where you can grow your crafting skills and make new friends? We are here to show you the joy of crafting and how therapeutic it can be. Even if you’ve never made anything before, we’ll give you everything you need to get started on your creative journey—so you can craft with confidence! Join here.