Envelope Size Guide
Not sure exactly what you’re looking for? The following is a list of common envelope uses, categorized by section and size. Certain envelopes serve different purposes, so let us help you find the exact one that fits your needs!
View or download our Envelope Size Guides!
Business Envelope Sizes Invitation Envelope Sizes
BUSINESS
#6 3/4, #7, #7 3/4
∙ Small invoices
∙ Personal checks
∙ Donations
∙ Small business reply
#8 5/8, #9
∙ Invoices
∙ Return envelopes
∙ Check mailing
∙ Personal correspondence ∙ Newletters∙ Personal correspondence ∙ “Thank you” notes
#10
∙ Most common size of mailing envelope
∙ Everyday mailings
∙ Invoices
∙ Can hold smaller return envelopes
Shop Custom #10 Envelopes
#11, #12, #14
∙ Documents
∙ Letters
∙ Holds #10 and smaller
LARGE
6 x 9, 6 1/2 x 9 1/2, #6, #9 3/4
∙ General mailings
∙ Advertisements/Marketing ∙ Jumbo cards
Bubble-lined/Poly Bubble
∙ Useful for mailing or storing fragile items that require extra protection
First Class Borders
∙ Tyvek material keeps envelopes from tearing in transit
∙ Large documents
Shop Custom 6x9 Envelopes
9 x 12, 10 x 13
∙ General mailings
∙ Advertisements/Marketing ∙ Jumbo cards
Expansive
This envelope’s ability to expand allows for it to fit larger quantities of documents, magazines, or brochures
∙ Bulky materials
∙ Magazines & catalogs ∙ Important documents
Tyvek
∙ Tyvek material keeps envelope from tearing in transit ∙ Great for bulky mailings you want to be sure will reach their destination safely
A1 ∙ Used for response/RSVP cards or “thank you” cards
reach their destination safely
A8 ∙ Popular size for holiday cards and other greeting cards
∙ Great for holiday cards, party invites, announcements, & more
A9 ∙ Popular size for holiday cards and other greeting cards
∙ Fits a 5 1/4” x 7 7/8” card
∙ Fits a 5 1/2” x 8 1/2” card
∙ A1 Fits a 3 1/2” x 5” card A2 ∙ A2 Holds a standard A2 card or other 4 1/2” x 5 1/2” card
A4 ∙ Used for birth announcements, photos, holiday cards, or “save the dates”
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A6 ∙ Used as an inside envelope for A7 wedding invites or smaller wedding invitations
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A7 ∙ Common wedding invitation envelope size
∙ Great for holiday cards, party invites, announcements, & more
∙ Fits a 4” x 6” photo or card ∙ Fits 4 1/2” x 6 1/4” card
∙ Fits 5” x 7” card
A10
∙ Can fit A8 or A7 inside
∙ Good for oversized greeting cards or invites, personal correspondence
∙ Used for multiple pieces of information mailed together
∙ Fits a folded 8.5” x 11” letterhead
Square ∙ Specifically designed for square invitations of varying sizes