The Standard Size for Wedding Invitations

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Juno Le/Demand Media

There is no one standard size for wedding invitations. The size largely depends on the standard sizing for envelopes as well as the availability of those envelopes. You can create invitations on any type of paper, but they generally fit within one of three standard announcement-sized envelopes.

Announcement Envelopes

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Juno Le/Demand Media

Standard envelopes with the designation of "A" are considered announcement envelopes. These envelopes are commonly used for greeting cards, announcements and invitations.

Envelope Edges

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Juno Le/Demand Media

Announcement envelopes typically have a V-shaped pointed edge that is glued down or a square-shaped opening edge.

A-7 Envelopes

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Juno Le/Demand Media

A-7 sized envelopes hold invitations that are approximately 5 inches by 7 inches. The envelopes are 5.38 inches by 7.63 inches on the outside and 5.25 inches by 7.25 inches on the inside.

A-10 Envelopes

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Juno Le/Demand Media

A-10 envelopes hold invitations that are 4 inches by 9 inches. The inner dimensions of the envelope are 4.13 inches by 9.5 inches and the outer dimensions are 4.38 inches by 9.75 inches.

A-2 Envelopes

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Juno Le/Demand Media

A-2 envelopes hold invitations that are 4.1 inches by 5.25 inches. The outer dimensions of the envelope are 4.375 inches by 5.75 inches, with the inner dimensions only slightly larger than the recommended invitation size.