Our Custom Button Packs increase retail value and customer interest by coupling your custom buttons with an attractive full color, 16pt backing card. 1.5" Round x 4 Button Packs feature four 1.5" round custom buttons and a custom backing card. This size of custom button pack makes a great promo item for tradeshows, events, and musicians, artists, and publishers. All custom button packs include an optional retail-ready hanging hole.