Discounted Packaging | Custom Packaging & Printed Boxes USA / Connected packaging
Envelope and mailer bag size finder
Envelope size for flat contents, with margin and thickness allowance.
How it works
Envelope inside = contents + margin on each side + thickness (flat envelopes lose width as the contents get thicker).
Tip
Over about 6 mm thick, a gusseted mailer or a slim box protects corners better.
Questions
A4 contents?
210 × 297 mm needs about C4 (229 × 324 mm).
US Letter contents?
8.5 × 11 in usually goes in a 9 × 12 in envelope.
Planning estimate only. Confirm sizes, strength and costs with samples and your written quote.
PLAN YOUR PACKAGING
From a better brief to a tailored quote.
Check sizing, compare materials and share your requirements. Final specifications and pricing are confirmed by the team.
Request a packaging quoteSelected delivery market: United States
Planning delivery to one of these American destinations?
New York, Los Angeles, Chicago, Houston, Miami
Add the delivery city and ZIP code to your brief. Freight, duties and delivery availability are confirmed in the quote.