# Double-wall boxes, 18 × 12 × 8 in, 15 pack > Fits a boxed pair of sneakers with room for padding. - Boxes, Best value - Typical UK price: $45 to $70 (a typical band, not a live price) - Platforms: Whatnot, eBay, Vinted, TikTok Shop, Depop, Etsy, Facebook Marketplace, Mercari, Poshmark, Vestiaire Collective - Orders a week: 0–2000 - Checked October 7, 2026 Double-wall cardboard resists crushing better than single-wall, so your boxed sneakers arrive intact. ## Kit rankings - #3 in [Best shipping boxes for US home sellers](https://sellersetups.com/us/kit/boxes) ## Setups - [Anime figure garage for TikTok Shop and eBay](https://sellersetups.com/us/setups/anime-figures-tiktok-shop): Box protectors, double-wall cartons, a ring light and a tripod for selling boxed anime figures and blind boxes in short TikTok videos and on eBay. - [Holiday toy rush setup for October to December](https://sellersetups.com/us/setups/christmas-toy-rush): Stock shelving, a packing bench and a fanfold label printer for selling toys through the holiday peak, from pre-orders to January returns. - [Storage auction garage setup for Whatnot, Etsy and eBay](https://sellersetups.com/us/setups/clearance-lockup-live-and-etsy): Sort a won storage unit into four zones in a weekend, open mystery crates live, and keep the 20 year old pieces back for Etsy. - [eBay electronics reselling setup](https://sellersetups.com/us/setups/ebay-electronics-reseller): A testing bench, bagged cables, double-wall boxes and clear battery rules for reselling 10 to 50 phones, consoles and gadgets a week on eBay. - [Snack box seller in a spare room](https://sellersetups.com/us/setups/food-snack-box-spare-room): World candy and chip boxes sold on TikTok Shop and eBay, from a spare room set up around state food rules and best by dates. - [Garage setup for 150 to 300 orders a week](https://sellersetups.com/us/setups/garage-150-orders): The step up from a spare room: a garage with picking shelves, two packing tables and a printer built for volume. - [Golf club and sportswear setup for eBay and Depop](https://sellersetups.com/us/setups/golf-clubs-sportswear-garage): Single irons in cut-down boxes, retro jerseys and tennis tops in poly mailers, and a garage split into a clubs side and a clothing side. - [Vintage ceramics and glass from a spare room](https://sellersetups.com/us/setups/homeware-ceramics-glass-room): A spare room set up for pitchers, vases, dish sets and studio pottery sold on eBay and Etsy, with packing built to prevent breakage. - [Japanese import reseller with proxy buying](https://sellersetups.com/us/setups/japan-proxy-import-desk): Prize figures, Japanese-language card boxes and stationery bought through a proxy, then sold on Whatnot shows and eBay listings from one desk at home. - [Outdoor gear setup for a shed or garage, eBay and Whatnot](https://sellersetups.com/us/setups/outdoor-gear-shed-seasonal): Tents pitched in the yard before listing, tackle sold live in lots, and a floor scale for the family tent that needs a bigger box and a carrier quote. - [Pre-owned designer handbag room for Poshmark and eBay](https://sellersetups.com/us/setups/preloved-designer-handbags): Softbox light, dust bags, stuffing tissue and double-wall boxes for selling pre-owned designer bags that arrive holding their shape. - [Toy and collectibles live selling setup](https://sellersetups.com/us/setups/toy-collectibles-live): Box protectors, double boxing and coded shelving for selling construction sets, die-cast cars and vinyl figures live on Whatnot and on eBay. - [Sneaker reselling setup for a small room](https://sellersetups.com/us/setups/trainer-reseller-small-room): Shelving for 60 boxed pairs, authentication-ready photos and double-wall packing for a sneaker reseller on eBay and Mercari. ## Boxed sneakers, electronics and heavy stock Use double-wall boxes for boxed sneakers and electronics, or heavy home goods that must arrive without a dent. At 18 × 12 × 8 inches, this size takes a boxed pair of adult sneakers with room for padding around the shoebox. A 15 pack covers a sneaker or electronics reseller shipping a few boxes a week. If you ship high volumes from a garage, buy by the bundle from a packaging supplier. ## Flutes, flaps and inside size Double-wall cardboard has two fluted layers, so the boxes stack higher and resist more edge pressure. Look in the listing for the flute combination, such as BC, and a strength rating such as 275 lb test or 48 ECT. The quoted size is usually inside dimensions and the outer box is a little larger, so use the outer size when you buy the label. Full flaps top and bottom let you seal the box with an H-seal. Reject boxes that arrive creased or with crushed edges. Measure your largest boxed pair of sneakers before you buy. Some high-top and large-size shoeboxes need a bigger box. ## Packing boxed sneakers or electronics Tape the base with an H-seal of packing tape. Lay a bed of bubble wrap or crumpled paper, then wrap the shoebox or product box in a layer of bubble wrap to keep its corners sharp. Pack void fill into each gap until the inner box cannot shift. Close and seal the top, then put the label on the largest face, away from the seams. Weigh and measure the packed box before you buy a label. Carriers charge by dimensional weight on larger boxes, so a light 18 × 12 × 8 box can cost more than its scale weight suggests. ## Single-wall boxes or rigid mailers instead Small single-wall boxes cost less per box and suit light items under a few pounds that only need a rigid shape. Rigid mailers suit flat items and add less weight to the package. For high-value jewelry or bags, put a rigid presentation box inside a double-wall box, and keep the presentation box clear of tape and labels. ## $3 to $4.70 a box against a refund At $45 to $70 for 15, each box costs more than a single-wall box. On a $150 pair of sneakers, a refund for a crushed shoebox costs you the sale as well as the box. If you sell boxed sneakers or collectibles, buyers judge condition by the box that comes with the item, so keep that box undamaged. Add the shipping box cost to your listing price. ## Common mistakes - Wrap the shoebox and fill the gaps, or the corners crush against the box walls. - Don't tape a label onto the product's own box. Put boxed stock in an outer box and label that. - The quoted size is usually inside dimensions, so the packed box can come out bigger than you priced for. Measure the packed box. - Seal the bottom with an H pattern, or a heavy base can split open with only the top taped. - Don't reuse a crushed box for heavy or fragile items, because it has lost strength. ## Guides - [How to ship a bike and other bulky items](https://sellersetups.com/us/guides/how-to-post-bulky-items): Carrier size limits, length plus girth math, and how to ship a bike, golf clubs, dumbbells and a stroller. - [How to ship Funko Pops without crushing the box](https://sellersetups.com/us/guides/post-funko-pops): Collectors buy the window box as much as the figure. A protector, outer box and void fill keep corners sharp and the window clear in transit. - [How to sell on Facebook Marketplace in the US](https://sellersetups.com/us/guides/sell-on-facebook-marketplace): Local pickup or shipped checkout, prices set against your area, payment you can verify, and safe meetups for furniture, bikes and baby gear. - [How to sell on Vestiaire Collective in the US](https://sellersetups.com/us/guides/sell-on-vestiaire-collective): Getting a designer piece approved, pricing it in dollars with room for offers, and shipping it to Vestiaire's authentication team or the buyer. ## Questions ### Do 18 × 12 × 8 inch boxes fit boxed sneakers? They fit most adult shoeboxes with room for padding. Measure larger sizes and high-top boxes before buying. ### Is double-wall worth the cost over single-wall? For heavy or fragile items, yes: one damage refund costs more than a box at $3 to $4.70. ### Does dimensional weight apply to this box? It can. USPS, UPS and FedEx each set when they charge by size instead of weight, so check their current rules or compare rates in your label tool. ### Is the listed size inside or outside? Most listings quote inside dimensions. The outer box measures a little more. ### How much padding do I need inside? Enough that the inner item cannot move when you shake the box. Leave room for padding on each side.