What Size Is an A10 Envelope?

What size is an A10 envelope? This is a question that we get asked a lot, and it’s actually pretty simple to answer. Here’s everything you need to know about A10 envelopes.

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Envelope Sizes

The standard envelope sizes are:A6, A7, A8, A9, and A10.

Standard Envelope Sizes

There are many different envelope sizes, but some of the most common are A2, A6, A7, A10, and #10.

A2 envelopes are 4 3/8″ x 5 3/4″, making them slightly larger than a standard greeting card. They can be used for invitations, thank you cards, stationery, and other small items.

A6 envelopes are 4 3/4″ x 6 1/2″, making them slightly smaller than a standard piece of paper. They can be used for smaller items such as greeting cards and invitations.

A7 envelopes are 5 1/4″ x 7 1/4″. They can be used for invitations, announcements, and other medium-sized items.

A10 envelopes are 6 1/8″ x 9 1/2″. They can be used for large items such as brochures and catalogs.

#10 envelopes are 4 1/8″ x 9 1/2″. They can be used for letters, documents, and other large items.

Non-Standard Envelope Sizes

A10 envelopes are one of many non-standard envelope sizes. There are a variety of reasons you might need an envelope that falls outside of the standard sizes, such as mailing a large brochure or booklet.

Non-standard envelope sizes can be tricky to find, but we’ve got you covered. We offer a wide selection of non-standard envelopes in a variety of colors and styles, so you’re sure to find the perfect envelope for your needs.

Here are a few of our most popular non-standard envelope sizes:

-A9: 5 3/4″ x 8 3/4″
-A10: 6 1/8″ x 9 1/2″
-6″ x 9″: 6″ x 9″
-9″ x 12″: 9″ x 12″

A10 Envelope

The A10 envelope is the largest envelope in the standard envelope series. It measures 9-1/2 inches by 13-1/2 inches and is typically used for Reply Envelopes, or R.S.V.P.s.


An A10 envelope is a tiny envelope with a deeplypointed flap that is typically used for Wedding Invitations. This size envelope is sometimes hard to find, but we do offer custom printing on A10 Envelopes. Below are the dimensions for an A10 Envelope.

-Size: 6 x 9 1/2
-Springhill Digital White Linen envelopes or
-12pt white cardstock with matching digital liner
-Gummed closure (tongue lick) or self-seal closure


A10 envelopes are mostly used for special invitations, greeting cards, and wedding announcements. Of course, you can use them for other purposes as well, but their large size does make them a bit more difficult to use for general correspondence.