Can you check with another P.O. ? I was in a block exchange on this board and some people had to pay extra to send a block in an envelope, one was required to get those small manilla envelopes for her blocks and had to pay over A doller to send out each, I wraped my blocks in syran put it in a legal size envelope and used 1 stamp they all went through no problem. I always thought the US post office charged the same way all over the US, maybe Im wrong or maybe the PO is. I better be quiet My PO may be in the wrong LOL and I'll pay for it next time!