Quick answer: Metal bird buttons are decorative metal-alloy shank buttons with a raised branch-and-bird relief design and a smooth, color-filled face. They come in four colors — black, white, white-edge coffee and beige-edge coffee — in four sizes from 18mm to 25mm, and add a nature-inspired, vintage touch to coats, knitwear and all kinds of … Continue reading The Complete Buying Guide to Metal Bird Buttons