Mailer Size Chart: Bubble, Poly & Corrugated Sizes
Every mailer size on one page: bubble mailers (#000–#7), poly mailers, corrugated and literature mailers, and rigid mailer boxes. Measure your item and check the selected mailer’s usable space. Product dimensions may describe the outside or the usable interior; lining, seams and closure flaps can reduce room for contents.
Bubble mailer sizes (#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" |
Full detail, including what fits each number, padded vs unpadded fit rules, and case pricing on 148 bubble mailers, is on the bubble mailer size chart.
Poly mailer sizes
Standard poly mailer sizes: 6 x 9" · 7.5 x 10.5" · 9 x 12" · 10 x 13" · 12 x 15.5" · 14.5 x 19" · 19 x 24". Lightweight, tear-resistant, and the cheapest way to ship soft goods; see the poly mailer size chart or shop 69 poly mailers.
Corrugated & literature mailer sizes
Rigid corrugated mailers protect flat and shallow items without a full box. Popular stocked sizes have their own pages with live case pricing: 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 644 mailer boxes, or compare formats in mailer box vs corrugated mailer.
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.