Here is how to ship clothes in short: fold the item, seal it in a plastic bag or tissue, put it in a poly mailer or small box, weigh the packed parcel, and attach the marketplace’s prepaid label or buy USPS Ground Advantage postage. At 8 oz or less, retail Ground Advantage runs $8.40 to $10.20 by distance, at prices effective October 4, 2026.
Shipping is where small resale profits disappear. A label one weight class too light gets adjusted, an overweight Poshmark parcel costs you money, and a poorly packed item turns into a damage claim. This guide covers packing, the weight rules that set the price, the current USPS prices and how each marketplace handles labels. For selling itself, see the thrift and resale guide.
How to package clothes for shipping
- Clean and fold. Fold the garment neatly to fit the mailer without stuffing it.
- Protect it from moisture. Slip it into a clear plastic bag or wrap it in tissue, so a wet parcel doesn’t mean a wet item.
- Choose the outer packaging. Soft, lightweight clothing fits in Poly Mailers on Amazon. Shoes, structured bags, beaded or embellished pieces and anything that could be crushed go in a sturdy box.
- Stop it moving. Whatnot’s packaging rule applies everywhere: the item must not move or be crushed, and boxes shouldn’t be overfilled. For boxed items, Whatnot’s general guide is about 2 inches of padding on each side.
- Weigh the packed parcel. Item plus packaging, on a Digital Shipping Scale on Amazon. This number decides your label.
- Attach the label flat on the largest surface, with no tape over the barcode.
Weight and size rules that set the price
Mercari’s shipping guide spells out the rules that apply to most labels. Shipping weight includes the item, packaging, wrapping and box. Packages over 1 lb are rounded up to the next pound. Carriers charge the higher of actual or dimensional weight.
Under USPS rules, dimensional weight applies to parcels over one cubic foot (1,728 cubic inches). Length plus girth can’t exceed 108 inches (130 inches for Ground Advantage Retail, at the oversized price). Parcels over 22 inches long pay a length surcharge, for example $4.50 for 22 to 30 inches on retail parcels. The practical takeaway: a big, mostly empty box can cost more than a snug mailer holding the same sweater. Size the packaging to the item.
USPS prices for shipping clothes
USPS prices in Notice 123 took effect October 4, 2026. Ground Advantage retail (the post-office counter) prices vary by distance, from the nearest zone to the farthest:
| Packed weight | USPS Ground Advantage retail, effective Oct 4, 2026 |
|---|---|
| 4 oz or 8 oz | $8.40 to $10.20 |
| 12 oz or 15.999 oz | $10.05 to $13.65 |
| 1 lb | $10.05 to $13.65 |
| 2 lb | $11.30 to $19.80 |
| 3 lb | $11.80 to $23.15 |
| 5 lb | $13.75 to $27.45 |
Under 1 lb, retail prices step at 4, 8, 12 and 15.999 oz; above 1 lb they step by the pound. Commercial prices, the kind you get when buying postage online or through a marketplace, are lower: about $7.33 to $8.95 for parcels up to 15.999 oz, per USPS’s commercial table. The price list doesn’t say whether holiday-season pricing applies, so check the USPS Postage Price Calculator for your exact route before you ship.
Priority Mail Flat Rate retail prices from the same list: Flat Rate Envelope $13.90, Legal Flat Rate Envelope $14.25, Padded Flat Rate Envelope $15.00, Small Flat Rate Box $14.65, Medium Flat Rate Box $25.80, Large Flat Rate Box $36.10. Flat Rate can make sense for a heavy item going cross-country. For a light top, Ground Advantage usually costs less. Check both.
Cheapest way to ship clothes: use the marketplace’s label
For most resellers, the cheapest way to ship clothes is the platform’s own prepaid label, because the buyer pays some or all of it. Labels and prices change, so confirm on each platform’s help pages.
- Poshmark: a flat $6.49 buyer-paid USPS Ground Advantage label for every order up to 5 lb, “prepaid and pre-addressed.” Over 5 lb the cost is yours: $5 for 5.01 to 10 lb and $10 for 10.01 to 15 lb, taken from earnings. Don’t put a Ground Advantage label on a free USPS Priority Mail box. See how to sell on Poshmark.
- Mercari: you choose whether the buyer or you pay for the prepaid label. Overweight or oversize charges are deducted from your sales. Mercari updated prepaid label prices for some weight classes starting October 19, 2026. See Mercari fees.
- Whatnot: buyers pay shipping at checkout, you print Whatnot’s label (4 × 6 or 8.5 × 11), and you ship within 2 business days. For Ground Advantage you supply the packaging. See how to sell on Whatnot.
- eBay: you set shipping. The final value fee applies to shipping charged to the buyer, so padding the shipping charge raises your fee. See eBay fees.
UPS and FedEx are also options for buying your own postage. Compare their current rates on their own sites against USPS for your package size and route.
Common shipping mistakes
- Guessing the weight. A 15 oz sweater in a mailer can weigh over 1 lb packed, which moves it up a price step.
- Bundling past 5 lb on Poshmark. The overweight upgrade comes out of your earnings.
- Oversized boxes. Dimensional weight and length surcharges can cost more than the item’s actual weight.
- Shipping late. Whatnot requires shipment within 2 business days, and buyers on any platform are waiting on the parcel.
For a side-by-side of shipping models on the two biggest clothing platforms, see eBay vs Poshmark.
The verdict
Ship soft clothing in a poly mailer with a moisture barrier, put anything crushable in a snug box, and always weigh the packed parcel before choosing a label. Use the marketplace’s prepaid label where it exists, since Poshmark’s flat $6.49 and Whatnot’s buyer-paid checkout shift the cost to the buyer. When you buy your own postage, USPS Ground Advantage is the default for light clothing, priced from October 4, 2026 at $8.40 to $10.20 retail under 8 oz. Check the USPS calculator for your exact route.
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FAQ
What is the cheapest way to ship clothes?
Usually the marketplace’s prepaid label, since buyers pay some or all of it. Buying your own, USPS Ground Advantage is priced by weight and distance, with commercial (online) prices below retail.
Can you ship clothes in a poly mailer?
Yes, for soft items that can’t be crushed. Use a box for shoes, structured bags and embellished pieces.
How much does it cost to ship clothes on Poshmark?
A flat $6.49, paid by the buyer, for parcels up to 5 lb, as of November 2026. Heavier parcels cost the seller $5 (5.01 to 10 lb) or $10 (10.01 to 15 lb).
Does USPS still have First-Class Package Service?
No. USPS Ground Advantage replaced it, and Ground Advantage is the standard USPS option for light clothing parcels.
