# Die-cut mailer boxes, 50 pack > Fold-up boxes that close without tape. - Boxes, Starter pick - Typical UK price: $25 to $45 (a typical band, not a live price) - Platforms: Whatnot, eBay, Vinted, TikTok Shop, Depop, Etsy - Orders a week: 0–2000 - Checked October 7, 2026 These fold flat, lock with tabs and keep a small item snug, so it ships in a compact package. Pick a depth that fits your usual item with a little padding. ## Kit rankings - #1 in [Best shipping boxes for US home sellers](https://sellersetups.com/us/kit/boxes) ## Setups - [Crystal live-show garage for Whatnot and TikTok Shop](https://sellersetups.com/us/setups/crystal-live-shows-garage): Bulk tumbled stones in tubs, an overhead phone, LED panels and small boxes for running crystal live sales several nights a week at volume. - [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. - [Squishy toy live shows from a bedroom corner](https://sellersetups.com/us/setups/squishy-live-corner): Needoh-style squeeze toys sold in fast Whatnot and TikTok Shop shows, packed in padded envelopes from one desk and three tubs. ## Items too deep for a mailer This box suits you if your items are too deep for a bubble mailer but nowhere near a big carton: boxed figures, a pair of kids' sneakers, a squishy toy, skincare sets, a small gadget or home goods piece. At five to fifteen packages a week on eBay, Mercari or TikTok Shop, you work through a 50 pack in one to three months. Once you ship daily, a bundle order from a packaging supplier usually cuts the cost per box. ## Outside size, tabs and a second seal strip Sizes such as 9 × 6 × 4 in or 8 × 6 × 2 in keep a small item snug and stay under the size where carriers start charging by volume. USPS publishes its size and dimensional weight rules, so check them before you settle on a box. Die-cut boxes fold from one sheet and lock with tabs. Choose single-wall corrugated board, a tuck-in lid with side dust flaps, and ideally two peel-and-seal strips so the buyer can close it again for a return. Buy two or three depths if your inventory varies. A box that fits the item closely needs less filler and resists crushing better. ## Folding, filling and closing Fold the base and sides along the creases, then push the end flaps in until the locks click. Do a dry fold of a new size before packing, as some boards need a firm press along the score lines. Wrap fragile items in bubble wrap or honeycomb paper, then fill the corners with paper so nothing moves when you shake the box. Close the lid and seal it with the strip or a single band of brown tape. Stick the shipping label flat across the lid without wrapping over an edge, and weigh the finished package before you buy postage. ## Other boxes and mailers Small corrugated boxes, 25 pack, are the fallback: standard boxes that you tape shut, useful for awkward shapes or when you run out. Double-wall boxes, 18 × 12 × 8 in, 15 pack, are the step up for heavy or fragile items. Bubble mailers take flat items and keep shipping costs lower. Poly mailers suit clothing that cannot break and costs less to ship. Box protectors for vinyl figures go inside this box when a collector expects a mint display box. ## Packaging under a dollar per order Spread over 50 boxes, a $25 to $45 pack adds about 50 to 90 cents to each order. With a little filler and a label, packaging stays around a dollar for most small packages. Reuse clean boxes from your own deliveries for low-value items, and keep the new die-cut boxes for orders where presentation counts. Cover old labels and barcodes fully on any reused box. ## Common mistakes - Allow half an inch or so on each side; a box sized to the exact item leaves no room for wrap. - Folding against the score lines weakens the corners. Press along the creases first. - A heavy item can split the base of a single-wall die-cut box, so move to double-wall for weight. - Fit the label on one flat face. A label wrapped over an edge won't scan. - Cover every old label on a reused box: a visible old barcode can misroute the package. ## Questions ### Will these boxes keep my shipping cost down? Small, snug boxes usually price by weight alone. Larger boxes can be charged by size, so compare the box with USPS's current dimensional weight rules. ### Do die-cut boxes need tape? The locking tabs hold the box together. Add the peel-and-seal strip or a single band of tape across the lid so it stays shut in transit. ### Which depth should I buy first? Measure the five items you sell most and pick the depth that fits most of them with a layer of wrap. Add a second size later. ### Are these fine for UPS and FedEx as well as USPS? For light items, yes. Every carrier handles packages roughly, so wrap fragile pieces well or use a double-wall box. ### Can buyers reuse them for returns? Boxes with a second peel-and-seal strip close again without tape, which makes returns easier for the buyer.