Crystal-clear plastic for figurine visibility. Heavy-duty (0.45 mm thick) archival-grade boxes. Stackable to maximize surface space. Acid free to ensure long-term archival storage. Fits most standard-sized pop-ular vinyl collectibles. Keep your valuable collectibles protected with the Entertainment Earth Vinyl Collectible Collapsible Protector Box 20-Pack! Use the top flap opening to easily insert your collectible while keeping the item in its original packaging. The ultra-clear, acid-free plastic lets you see your figurine when on display. Each box measures approximately 6.325-inches tall x 4.5-inches wide x 3.5-inches long x 0.45 mm thick. Fits most standard-sized Funko Pop! Vinyl collectibles.