DIY Envelope Instructions To Fit Any Greeting Card

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Square overhead feature photo of a square brown kraft paper envelope being folded around a square birthday card that has a pink sprinkled donut and says 'Have a Sweet Birthday!' On a black background is a wood ruler and X-Acto knife.

Use these DIY Envelope Instructions to make envelopes to fit any greeting card size.

Whether you made a card or printed one of our Free Printables, you can use these guidelines to make an envelope.


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How to make a DIY Envelope

This is not an exact science but I’ve made several envelopes by using this measurement guideline:

If you card is a rectangle: Make an envelope by cutting a square piece of paper that measures 3″ larger than your cards longest side.

For example, if your greeting card is 5″ x 7″, you would use a 10″ x 10″ square piece of paper for your envelope.

If your card is square: Make an envelope by cutting a square piece of paper that measures 4″ larger.

For example, if your card is 7″ x 7″ then you need a square sheet of paper that measures 11″ x 11″.

Photo of a kraft paper envelope being made for a 5x7 card. The square cut craft paper is shown in a diamond position with the card in the center shown horizontally with a closeup of a wood ruler that shows that the craft paper had been cut into a 10" x 10" square.
Use a 10″ x 10″ sheet of paper to make an envelope for a 5″ x 7″ Card.


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The birthday card shown below is one of our free printables. The folded card size is 5″ x 5″ so I started with a 9″ x 9″ square piece of paper. I used craft brown paper but you could use any paper you have on hand – patterned or colored paper.

Start with an 8" x 8" sheet of paper. Position the paper like a diamond and place the folded card in the center. Fold all four corners in using the sides of the card as a guide. Unfold the paper and snip triangle corners where folds overlap. Fold the two side flaps in. Add glue to the bottom flap to complete your envelope.
The card shown above is 5″ x 5″ and the –paper size for the DIY envelope shown is 9″ x 9″.


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