Explore durable, waterproof and colored poly mailer bags in bulk, made for business shipping.
JiaroPack provides a full range of sizes and rich color options that protect every order while giving your packaging a professional look. Simplify your shipping with lightweight, waterproof mailers designed for online sellers.
15 products
Start with what you ship most, then size the bag to the item’s folded length and width plus a little breathing room. If you’re regularly fighting the seal or stretching seams, bump up one size. For multi-item orders, size to the full stack thickness, not just the footprint.
Measure the mailer laid flat across the usable bag area: width is side-to-side, and height is bottom-to-opening. The sealing flap is usually not included in the listed size. If you’re comparing brands, confirm whether the size refers to the bag body only.
Most sizes are “flat measurements” of the bag body, edge to edge, before anything is inside. The usable interior is slightly smaller because of side seams. Once you add thickness, the effective capacity drops fast, so plan for some extra room.
Poly mailers are best for non-fragile soft goods like apparel, fabric accessories, and other items that won’t crease or break. If the product needs structure or crush protection or has sharp corners, use a box or add protective inner packaging.
Use a poly mailer for soft goods and items that can flex without damage. Use a bubble mailer when you need built-in cushioning for small breakable or scratch-prone products. If you’re unsure, default to bubble for anything that could chip, crack, or dent.
Yes, but thickness changes how the package runs through sorting and how cleanly it seals. Once you get thick, lumpy, or uneven, you’re more likely to see handling issues and certain USPS surcharges depending on how it’s classified. For thick orders, size up or use a gusseted bag to keep the shape flatter.
It usually happens when the package can’t be processed on USPS sorting equipment due to its shape, stiffness, thickness, or unevenness. Overstuffed, rounded, or rigid contents can trigger it. The fix is typically to size up, pack flatter, and avoid hard edges pushing against the bag.
They do when the surface is clean and the label adhesive matches the plastic film. Avoid dusty bags, wrinkled applications, or placing labels across seams and folds. For higher-risk shipments, add clear label tape over the top edge or use a label pouch.
They’re designed to be tear-resistant, not “tear-proof,” and overstuffing is the fastest way to split seams or pop a seal. If you need to force the closure, it’s too small for that order. Size up or choose a thicker film if you’re shipping heavier, bulkier items.
Yes, custom-printed poly mailers are a common branding upgrade for DTC sellers. Most suppliers require a minimum order quantity and production lead time. If you’re testing, start with one core size you ship most often to keep it cost-efficient.
