mailing your envelopes
This is how I send my sweet candy squares. They are layered in 5 rows with 10 in each row. I put them on a card stock type paper and put them in an envelope (size Christmas pictures come in). I do wrap them in saran wrap. This way only cost me 1 stamp.
Barb
It is the "fatness" of envelope where the biggest concern is. They do not weigh too much.