My post office lady tells me what package to put something in. I alot of times will take fabric, address, tape, marking pen etc. to the post office to package there and I will ask the postlady shes a doll...what should I put it in and she tells me the cheapest way. I also say...but its bulging and she says....does it close? I say yes!!! She says works for me $4.95 flat rate. And sometimes I really truly wonder, how we manage to close them. And she ALWAYS tapes them for me.