<strong>USPS- FREE Spider Man Flat Rate Shipping Boxes! The boxes come in 3 sizes, each in a pack of 25!</strong> <strong>Sizes: Large- Inside Dimensions: 12" x 12" x 5-1/2" Outside Dimensions: 12-1/4" x 12-1/4" x 6" Medium Size 1- Inside Dimensions: 11" x 8-1/2" x 5-1/2" Outside Dimensions: 11-1/4" x 8-3/4" x 6" Medium Size 2- Inside Dimensions: 11-7/8" x 3-3/8" x 13-5/8" Outside Dimensions: 12" x 3-1/2" x 14"</strong> <strong>To place an order for the boxes, either sign in to your USPS.com account, or create an account. Add the boxes you want to your cart and check out! Please allow 7-10 business days for delivery.</strong>