Made with acid-free, non-PVC materials, store and protect your collectible cards in PRO 15+ Pack Boxes. These boxes are designed to hold trading cards, standard size (2.5 in. x 3.5 in.) or smaller, in Deck Protector sleeves. The PRO 15+ Pack Boxes are a compact, economical way to organize and store 15-card cube draft packs double-sleeved. With 8 available colors, these pack boxes can help you quickly identify different cubes.