13 x 16 x 4" Expansion Poly Mailers
- Dimensions: 13" x 16" x 4" exterior
- Material: 2.5 Mil Polyethylene
- Quantity: 100 mailers per case
- Weight: Approximately 4.66 lbs per case
- Shipping: Parcel eligible
Stock Number | 1 | 3 | 5 | 10+ | Add to Cart |
|---|---|---|---|---|---|
| Stock NumberEPM13164 | 1$26.68 | 3$26.68 | 5$26.68 | 10+$26.68 | Add to Cart |

Outside W x L x D: 13 x 16 x 4"
Quantity Per Case: 100
Order in Multiples of: 1
Freight Class: 60
Weight: 4.66 EA
NMFC Code: 20475-11
Ships Parcel: Yes
These 13 x 16 x 4 inch expansion poly mailers are built from 2.5 mil polyethylene with a gusseted bottom that expands up to 4 inches, giving the envelope enough depth to accommodate thicker or irregularly shaped items without straining the seal. The white exterior and silver interior lining deliver a clean, professional presentation while blocking moisture from reaching contents in transit.
These mailers are a practical choice for e-commerce fulfillment centers, subscription box operations, retail distribution, and direct-to-consumer apparel or soft goods shipping — anywhere orders vary in thickness and a standard flat mailer won't reliably close. Labels, ink, and postage stamps adhere directly to the outer surface without primers or additional treatment.
Construction includes high-strength seams rated to hold under overpacked conditions, puncture and tear resistant walls, and tamper-evident properties for added security. The self-seal closure incorporates a double-perforation tear strip so recipients can open cleanly without scissors. Each case contains 100 mailers and ships via parcel carrier.
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