What is the smallest postcard size available with a matching envelope?

Several postcard sizes can be ordered with a matching envelope, and the pairing depends on the finished size of the card. An envelope always needs a little extra room around the card so it slides in and out without bending the corners, which is why cards and envelopes come in matched sets rather than identical measurements.

These are the standard card-to-envelope pairings you will usually see:

The smallest size offered with an envelope can change with stock and season, so check the size and envelope choices listed on the postcard product page to confirm the current options before you order.