Best Pick
eBay Brand Central6.25" x 8.5" Polyjacket/Polymailer — 400 Envelopes
6.25″ × 8.5″ × 0″
+$0.00 Seller Free shipping · 3 lb billed
$0.150
landed per box
pack of 400 · $60.00
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Cheapest 8×6×4 padded mailer
Compare real eBay prices for 8×6×4 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
100 - 6 x 8 Photo Shipping Flat Rigid Mailer Cardboard White Envelope Self Seal
6″ × 8″ × 0″
+$0.00 Seller Free shipping · 3 lb billed
$0.240
landed per box
pack of 100 · $24.00
100 - 6 x 8 Photo Shipping Flat Rigid Mailer Cardboard White Envelope Self Seal
6″ × 8″ × 0″
+$0.00 Seller Free shipping · 3 lb billed
$0.250
landed per box
pack of 100 · $25.00
Showing 6 of 59 real listings. Want all of them with custom quantity and weight? Search now →
What fits in a 8×6×4 box
A 8 × 6 × 4 inch box holds 192 cubic inches (0.11 cu ft) of interior space, putting it in the small-category. It's a popular choice for shipping items like small electronics, jewelry boxes, phone cases — things that fit comfortably within those dimensions while leaving room for protective padding. Most sellers list it in bulk packs of 25, 50, or 100, which brings the per-box cost under $1 for the cheapest options.
Shipping math for this size
Shipping cost for this size depends heavily on dimensional weight. For a 8×6×4 box, UPS and FedEx Ground compute a DIM weight of 2 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. The two carriers come out about the same for this volume, which is why our search results factor in DIM-weight automatically instead of just showing sticker prices. For very light items, a USPS Priority Flat Rate envelope or small box may beat buying this size outright — we flag that when it applies.
How to pick the right pack size
When buying a 8×6×4 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 8×6×4. Adjust weight, quantity, or size as needed — we'll re-rank for your exact scenario.