Best Pick
1000 10x13 White Poly Mailers Envelopes WEAK SELF SEALING Shipping Mailer Bags
10″ × 13″ × 0″
+$0.00 Seller Free shipping · 3 lb billed
$0.050
landed per box
pack of 1000 · $50.00
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Cheapest 10×8×4 padded mailer
Compare real eBay prices for 10×8×4 shipping boxes with DIM-weight-aware shipping estimates.
Live listings — sorted by landed cost per box
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eBay Brand Central9" x 11.5" Polyjacket/Polymailer — 400 Envelopes
9″ × 11.5″ × 0″
+$0.00 Seller Free shipping · 3 lb billed
$0.180
landed per box
pack of 400 · $72.00
eBay Brand Central10" x 12.5" Polyjacket/Polymailer — 400 Envelopes
10″ × 12.5″ × 0″
+$0.00 Seller Free shipping · 3 lb billed
$0.190
landed per box
pack of 400 · $76.00
eBay Brand Central12" x 15" Polyjacket/Polymailer — 400 Envelopes
12″ × 15″ × 0″
+$0.00 Seller Free shipping · 3 lb billed
$0.230
landed per box
pack of 400 · $92.00
#2 8.5x12 Poly Bubble Mailers Self-Seal Padded Envelopes 400 Pack
8.5″ × 12″ × 0″
+$0.00 Seller Free shipping · 3 lb billed
$0.250
landed per box
pack of 400 · $100.00
100-Pack WHITE 8.5 x 11" Padded POLY BUBBLE MAILER #2 shipping mailing envelope
8.5″ × 11″ × 0″
+$0.00 Seller Free shipping · 3 lb billed
$0.290
landed per box
pack of 100 · $29.00
Showing 6 of 54 real listings. Want all of them with custom quantity and weight? Search now →
What fits in a 10×8×4 box
A 10 × 8 × 4 inch box holds 320 cubic inches (0.19 cu ft) of interior space, putting it in the medium-category. It's a popular choice for shipping items like hardcover books, shoes, small electronics — things that fit comfortably within those dimensions while leaving room for protective padding. Bulk packs of 25, 50, and 100 are the common listing sizes, with per-unit pricing typically between $0.60 and $2.00 depending on quantity and seller.
Shipping math for this size
Shipping cost for this size depends heavily on dimensional weight. For a 10×8×4 box, UPS and FedEx Ground compute a DIM weight of 3 lbs using their 139 divisor, while USPS Ground Advantage uses a 166 divisor, giving 2 lbs. Carriers bill whichever is greater — your actual weight or the DIM weight. USPS's higher divisor makes it roughly 1 lbs cheaper than UPS/FedEx for this size when your item is light, which is why our search results factor in DIM-weight automatically instead of just showing sticker prices.
How to pick the right pack size
When buying a 10×8×4 box, the biggest cost lever isn't which retailer you pick — it's which pack size you commit to. A 100-pack typically costs 2-3× more than a 25-pack but brings the per-unit cost down by 40-60%. Our ranking is based on **landed cost per box** — the pack price plus shipping, divided by the number of boxes. A 100-pack with $10 shipping works out cheaper per box than a 25-pack with the same shipping, because the fixed cost spreads further. Every listing below links to a real product page from eBay, ULINE, or other retailers; we don't show placeholder results.
Search with your own dimensions
Pre-filled with 10×8×4. Adjust weight, quantity, or size as needed — we'll re-rank for your exact scenario.