Square Envelopes | Square Invitation Envelopes in Many Sizes

Shop for Square envelopes and get FREE shipping. Choose from a variety of sizes, including 5 x 5, 5.75 x 5.75, 6 x 6, 6.5 x 6.5, and many more! These square envelopes are perfect for invitations, greeting cards, or other special events. Choose from a variety of white, natural, Bag Kraft, transparent, or black envelopes.

Square invitation envelopes are ideal for wedding invitations, and offer a unique and creative way to mail invitations to your event. Want a natural, rustic, or vintage look? Choose the Bag Kraft square envelope, and personalize with your mailing information. Need something classic, clean, and high-end? Choose the Cougar or smooth Vellum envelopes in white or natural, for a smooth feel.

Square Envelope Sizes Guide


Not sure what size you need? Our guide can help you pick the right envelope. As a general rule of thumb, you will want to select an envelope slightly larger then your insert, to make it easy to insert and remove your item. Depending on the thickness of your insert, you may need more or less room around the item.

5 x 5 Square envelopes - Comfortably fits a card or invitation up to 4 3/4 x 4 3/4.
5.5 x 5.5 Square envelopes - Comfortably fits a card or invitation up to 5 1/4 x 5 1/4.
5.75 x 5.75 Square envelopes - Comfortably fits a card or invitation up to 5 1/2 x 5 1/2.

6x6 Square envelopes - Comfortably fits a card or invitation up to 5 3/4 x 5 3/4.
6.5 x 6.5 Square envelopes - Comfortably fits a card or invitation up to 6 1/4 x 6 1/4.

7.5 x 7.5 Square envelopes - Comfortably fits a card or invitation up to 7 1/4 x 7 1/4.
8.5 x 8.5 Square envelopes - Comfortably fits a card or invitation up to 8 1/4 x 8 1/4.

9x9 Square envelopes - Comfortably fits a card or invitation up to 8 3/4 x 8 3/4.

Need Something Special?

If you need unique colors, or special size envelopes, please Contact Us for more information. We have a variety of items available for special order, that are ready to ship in just a couple days.

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Have a question?

Our Team will be happy to help make your order (and life) a little easier. You can contact us
via email or call
847-425-1070.

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