Each square measures around 8 cm x 8 cm but may vary slightly in size due to them being handmade. You can select from fifteen stunning color options, and they are available with or without an iron-on backing. All Patches are sold individually unless otherwise specified. These granny squares aren’t just for trucker hats, they’re versatile pieces you can use for any DIY project you dream up! Stitch a few together to create a bag, use them for unique craft projects, or keep it simple and add them to hats. Each square is available with or without iron-on backing. If you choose without, and decide you want to attach them to a hat, no worries, you can still easily attach them by sewing instead of ironing.