Originally Posted by
SheriR
That's why I mentioned I used them too. Our first year swapping Birthday Candy I wasn't particular with a set of cards, when I took them to the PO they wanted over $3.00. I said NOWAY, took them home, and repackaged them. I've mailed mine the same way ever since.
Yes, if you make your package too thick they will charge you for a first class
package, rather than a letter. It's way more expensive! I think the thickness has to be 1/4" or less for it to be considered a letter. But that's easy to achieve if you stack your little squares right.