Mailer Size Chart: Bubble, Poly & Corrugated Sizes
Bubble mailers run from #000, 4 x 8 inches, to #7, 14.25 x 20 inches. Standard poly mailer sizes are 6 x 9, 7.5 x 10.5, 9 x 12, 10 x 13, 12 x 15.5, 14.5 x 19 and 19 x 24 inches. This chart covers bubble mailers #000 to #7, poly mailers, corrugated and literature mailers, and mailer boxes. Measure your item and check the listed usable space. Lining, seams and closure flaps reduce room for contents.
Bubble mailer sizes chart (#000 to #7)
| Size code | Typical listed dimensions |
|---|---|
| #000 | 4 x 8" |
| #00 | 5 x 10" |
| #0 | 6 x 10" |
| #1 | 7.25 x 12" |
| #2 | 8.5 x 12" |
| #3 | 8.5 x 14.5" |
| #4 | 9.5 x 14.5" |
| #5 | 10.5 x 16" |
| #6 | 12.5 x 19" |
| #7 | 14.25 x 20" |
Compare numbered sizes, purchase quantities and fit guidance in the bubble mailer size chart. Open an exact product to check its dimensions and current price.
Standard poly mailer sizes
Poly mailers are listed width x length in inches, flat. They are light and tear resistant, and they suit soft goods that do not need a box. Usable space is smaller than the listed size once the item has thickness.
| Poly mailer size (in) | Typical contents |
|---|---|
| 6 x 9 | Jewelry, small accessories, cosmetics |
| 7.5 x 10.5 | Socks, small folded tops, phone cases |
| 9 x 12 | T-shirts, leggings, documents |
| 10 x 13 | Folded shirts, light apparel |
| 12 x 15.5 | Hoodies, jeans, two or three folded items |
| 14.5 x 19 | Sweaters, jackets, multi-item orders |
| 19 x 24 | Coats, bedding, bulky soft goods |
See the poly mailer size chart for every stocked size, or shop poly mailers.
What size mailer do I need?
- Measure the item's width, length and thickness with any wrap or cushioning on.
- For a flat mailer, add the thickness to both the width and the length. A 9 x 11 inch item that is 1 inch thick needs at least a 10 x 12 inch mailer.
- Leave room past the seal so the flap closes flat. If the item sits right at the limit, go one size up.
- Check whether the listing gives outside or usable dimensions. Bubble lining takes space on the inside.
Corrugated & literature mailer sizes
Rigid corrugated mailers protect flat and shallow items without a full box. Popular stocked sizes: 8x7x4, 8x7x3, 13.5x3.5x3.5, and 17.5x3.5x3.5. Background: the literature mailers guide and chipboard mailers guide.
Mailer box sizes
Rigid mailer boxes (roll-end tuck-top cartons) suit subscription and retail-presentation shipping. Browse mailer boxes, or compare formats in mailer box vs corrugated mailer.
Buy these sizes by the case
Every size shows its case or pack count. The listed price is for the whole case or pack.
Poly mailersBubble mailersLiterature mailersMailer boxes
Orders of one or two items with a product subtotal of $500 or more ship free when the checkout freight rate is $45 or less, or $90 or less on orders of $1,000 or more. Orders of three or more items get the volume discount instead of free shipping. See the shipping policy.
Find a mailer by dimension
Need a specific width or length? The mailer directory by dimension lists every stocked footprint; 6x10 mailers have a dedicated buying guide. For flat-but-long items, consider mailing tubes instead. Matching a Uline bubble mailer or easy-fold mailer model? The Uline model cross-reference lists the equivalent by S-number.
Shop all mailersMailer vs box: which to ship in
Frequently asked questions
How do I measure a mailer size?
Measure the item’s width, length and thickness, including any cushioning. Check whether the product lists external or usable dimensions, and allow room for seams, lining and closure. A flat mailer needs extra width and length as the contents get thicker.
What do bubble mailer numbers like #0 or #2 mean?
Numbers such as #0 and #2 are commonly used bubble-mailer size labels. Dimensions and usable space can vary by product, so use the size chart as a starting point and confirm the exact listing before ordering.
Should I use a mailer or a box?
Mailers win on cost and dimensional weight for soft, flat, or padded-tolerant items; boxes win for rigid, fragile, or stacked contents. The mailer vs box guide walks the decision, and corrugated mailers split the difference for flat rigid items.
What size poly mailer do I need for a t-shirt?
A folded t-shirt usually fits a 9 x 12 or 10 x 13 inch poly mailer. Measure the folded shirt and add its thickness to the width and length before you pick a size.