Bubble Mailer Size Guide
Bubble mailers
Standard bubble mailer sizes (#000 through #7) and what fits
Bubble mailers are sold by industry-standard size codes from #000 (smallest) to #7 (largest). Pick the smallest size that fits the item with light room for cushioning - oversized mailers raise dimensional weight and shipping cost.
Use the chart below to map common ecommerce items to the correct bubble mailer size.
Bubble mailer size chart
| Size | Inside dimensions | Common items | Shop |
|---|---|---|---|
| #000 | 4 x 8 in | Jewelry, USB sticks, keys, small parts | 4x8 -> |
| #00 | 5 x 10 in | Cosmetics samples, small electronics, eyewear cases | 5x10 -> |
| #0 | 6 x 10 in | Phone cases, small books, sunglasses, accessories | 6x10 -> |
| #1 | 7.25 x 12 in | Soft toys, small apparel, paperback books | 7.25x12 -> |
| #2 | 8.5 x 12 in | Hardcover books, tablets in sleeves, small replacement parts | 8.5x12 -> |
| #3 | 8.5 x 14.5 in | Larger books, document folders, small framed prints | 8.5x14 -> |
| #4 | 9.5 x 14.5 in | Folded apparel, larger accessories, small auto parts | 9.5x14 -> |
| #5 | 10.5 x 16 in | Hoodies, larger apparel, small electronics with packaging | 10.5x16 -> |
| #6 | 12.5 x 19 in | Bulky apparel, multi-item kits, mid-size electronics | 12.5x19 -> |
| #7 | 14.25 x 20 in | Large apparel, soft housewares, oversized accessories | 14.25x20 -> |
Bubble mailer FAQ
Should I size up just to be safe?
Usually no. Oversized mailers add dimensional weight, allow contents to shift, and waste cushioning. Pick the smallest size that fits the item plus minimal padding.
Kraft, white, or poly bubble mailers?
Kraft is the lowest-cost standard. White looks cleaner for branded ecommerce. Poly bubble mailers add water resistance and tear strength.
When should I use a small box instead?
Switch to a small box when the item is fragile, rigid, has corners that can puncture, or is high enough value to need full six-sided protection. The Mailer vs Box Selector can help.