Great A8 envelopes is what we call our collection of 5 1/2 x 8 1/8 envelopes. Because of their great quality, great size, and great color(s), we couldn't help but find that ‘great' is the best adjective for the job. A8 Envelopes are a very popular size for wedding and event invitations. You can also use these for greeting cards, business announcements, or even fundraising flyers. The larger than average envelope size is perfect for inserting bigger and better material. Our greeting card envelopes can also be used as the outer envelope to your inner A7, A6, or A2 envelopes; a common practice for wedding invitations.