The retro flower painting round buttons are made of wood which is very safe for use. Buttons have 2 holes. They are a great selection for sewing, knitting, crochet, card making, scrapbooking and diy craft. We can use they decorate down jackets, jackets, backpacks, hats, shoes, shirts, trench coats, clothing, knitwear, belts, jeans and other sewing.