Asking about postage: Usually, when we mail out our fabrics, if you can squish them well, they are normal postage. The price is mainly based on thickness of the stuff in the envelope. Almost all of the blocks that I send back require more than a regular envelope. A lot of us use Press N Seal to compress everything in the envelope and to protect it from postal errors involving gremlins tearing the envelopes open. And, it seems that each post office operates on different rules and rates.