How to Ship Clothing: Best Practices

Clothing is one of the easiest categories to ship because it's soft, light, and rarely fragile. Done right, shipping clothes is fast and inexpensive. Done wrong, you're overpaying for boxes you don't need, or packages are arriving with water damage from a basic rainstorm that soaked through a paper envelope.

This guide covers the packaging options, carrier choices, and practical workflow for shipping clothing — whether you're a reseller moving individual items or a brand fulfilling hundreds of orders per week.

Poly Mailers Are the Right Choice for Most Clothing

A poly mailer is a lightweight, waterproof plastic envelope with a peel-and-seal strip. For the vast majority of clothing shipments — t-shirts, jeans, dresses, jackets, leggings — a poly mailer is the best packaging choice. It's waterproof (unlike paper mailers), much lighter than a box (saving on postage), and takes up minimal storage space.

Standard poly mailers come in multiple sizes. For a single t-shirt, a 10x13 inch mailer works well. For bulkier items like a hoodie or multiple garments, use 12x15.5 or 14.5x19. The mailer compresses around the clothing, so you have some flexibility on size — a 12x15.5 can typically hold 2–3 folded t-shirts.

When to Use a Box Instead

Poly mailers are sufficient for most clothing, but some situations call for a box. Structured items — blazers, dress shirts, items that wrinkle easily — benefit from a rigid box that maintains shape during transit. Luxury or gift items where presentation matters should be packed in a sturdy box, potentially with tissue paper.

Shoes always require a box — their own original box if available, or a plain corrugated box sized to fit snugly. Don't ship shoes loose in a poly mailer; they're heavy enough to tear mailers and may arrive scuffed or misshapen.

• T-shirts, tanks, leggings, lightweight items: poly mailer
• Jeans, shorts, lightweight jackets: poly mailer (larger size)
• Heavy coats, multiple garments: poly mailer or box depending on total weight
• Dress shirts, blazers, structured items: box to preserve shape
• Shoes: box (original if available, or close-fitting corrugated box)
• Gift shipments where presentation matters: box with tissue paper

Carrier Selection for Clothing

For clothing shipped domestically in the United States, USPS Ground Advantage is typically the cheapest option for packages under 5 lbs. A single t-shirt in a poly mailer might weigh 8–10 oz total, which puts it firmly in the inexpensive USPS weight bracket. Multiple garments reaching 2–4 lbs are still often cheapest via USPS.

Above 5 lbs, start comparing USPS against UPS and FedEx Ground. Bulk orders or heavy items (multiple pairs of jeans, winter coats) may be cheaper via UPS or FedEx depending on the destination zone. Use a shipping rate calculator that shows all carrier options simultaneously.

Preventing Water Damage

Poly mailers are waterproof, which handles most weather-related moisture. If you're using a cardboard box, the box itself will absorb moisture in heavy rain. For valuable or dry-clean-only garments shipped in a box, place the clothing inside a poly bag before packing in the box — this provides an inner waterproof layer.

Clothing arriving with water damage is a return and negative review waiting to happen. A $0.10 poly bag insert is cheap insurance against a $30 return shipping cost and the time cost of the dispute.

• Use poly mailers as primary packaging whenever possible — inherently waterproof
• For boxed garments: insert clothing in a poly bag before placing in box
• Avoid paper mailers for clothing — not waterproof, susceptible to tearing
• In high-humidity climates or rainy seasons, add a silica gel packet inside poly mailers for extended shipments