If you are creating cards or invitations, it’s helpful to know the sizes of standard envelopes so that once you have finished all that hard work, it’s possible to actually mail them.
You could, of course, create your own envelope, but if you are doing invitations or a mass of thank you cards after an event, you’ll probably want to stick to the sizes easiest to find at the stores.
One other quick card size tip – you’ll also want to consider the size of the sheet of paper you are printing them on. One of my favorite sizes is the A2 insert size – at 4.25 x 5.5, you can get four out of a standard 8.5 x 11 sheet of paper (or two if they fold over).
