First Class Letter
Letters are primarily for a small number of single cards.
If you choose to enable this option, here's how it works. You indicate the number of cards you can fit in one envelope.
As long as one or more letters is cheaper than package rate, it will be calculated as letters. For example, if you can ship 5 cards per letter and the buyer orders 12, then that takes three letters, so about $2 in stamps - still much less than package rate which would be at least $4.
Check this box to enable letter-rate shipping (thin flat items under 3oz)
- And don't forget to hit the "UPDATE" button for changes to stick
Number of cards per letter