4 3/4 x 6
Amazon.com: a6 envelopes .
The most common size for wedding invitation envelopes is A7 (5.25 x 7.25) which fits perfectly with a 5 x 7 invite but below, you’ll see that there are plenty of other sizes to fit your needs.
|COMMON ENVELOPE NAME||STANDARD SIZE||MAXIMUM ENCLOSURE SIZE|
|6-5/8 envelope||6 x 9-1/2 inches||5-3/4 x 9-1/4 inches|
|9 envelope||8-3/4 x 11-1/2 inches||8-1/2 x 11-1/4 inches|
|9-1/2 envelope||9 x 12 inches||8-3/4 x 11-3/4 inches|
|10 envelope||9-1/2 x 12-5/8 inches||9-1/4 x 12-3/8 inches|
A7 Envelopes (5 1/4″ x 7 1/4″) in 24lb. Bright White are a versatile, light-weight, square flap envelope with a smooth finish. The A7 envelope size is the perfect invitation envelope and also great for mailings, holding 5″ x 7 ” photos, invitations, announcements and more.
Amazon.com: 4×6 Envelopes .
clear envelopes by recollections™, 4.25″ x 5.5″
Envelopes & Seals – Card Making – Scrapbook & Paper Crafts | Hobby Lobby .
You can make amazing DIY envelopes out of pretty much any flat, paper-like material! All you have to do is make a template (super simple), trace around it, cut, and glue. You can easily make an envelope out of almost any foldable material, and the post office will deliver it!
Number 9 envelopes are small enough to fit inside a # 10 envelope . When you open your monthly statements, bills or a donation request, you’ll often find a smaller white # 9 envelope included inside as a prompt for funds.