Card and Envelope Sizes
There are questions about the size of cards a person can make, and which sizes will go through the Postal Service. Keep in mind any envelope smaller than 4" x 4" has to be hand delivered. The US Postal Service will not handle or deliver it.
With that said, here is a chart of the sizes of cards and envelopes that you can make. At the end of this page you will find a video I made on how to make an envelope for your cards without a template of any kind. Just need a ruler. So here goes.
| Paper Size | Folded In Half | Envelope Size |
| 3-3/8" x 4-3/8" | 2-1/4" x 3-3/8" | 2-5/16" x 3-5/8" |
| 4-7/8" x 5-3/4" | 2-1/8" x 5-3/4" | 2-5/16" x 6" |
| 2-3/4" x 5-1/2" | 2-3/4" x 2-3/4" | 3" x 3" |
| 4-7/8" x 7" | 3-1/2" x 4-7/8" | 3-5/8" x 5-1/8" |
| 3-3/4" x 7-1/2" | 3-3/4" x 3-3/4" | 4" x 4" |
| 8" x 9-1/4" | 4" x 9-1/4" | 4-1/8" x 9-1/2" |
| 5-1/2" x 8-1/2" | 4-1/4" x 5-1/2" | A2 or 4-3/8" x 5-3/4" |
| 8" x 12-1/4" | 4-1/2" x 6-1/8" | A4 or 4-3/4" x 6-1/4" |
| 9-1/4" x 6-1/4" | 4-5/8 x 6-1/4" | A6 or 4-3/4" x 6-1/2" |
| 7" x 10" | 5" x 7" | A7 or 5-1/4" x 7-1/4" |
| 8-1/2" x 11" | 5-1/2" x 8-1/2" | A9 or 5-5/8" x 8-5/8" |
Standard Envelope size of 3-5/8" x 6-1/2" can be bought in bulk. The envelope for the 4" x 9-1/4" card is the Standard #10 or Business Envelope and bought in bulk. For the A9 Envelope you can use the 6" x 9" envelope and bought in bulk.
Okay as promised, here is my YouTube video, Making An Envelope to fit your cards.