I have always sent USPS Priority Mail on the advice of my mother (RIP) who worked for the post office. She was postmaster in the little town I was raised and we lived. Everything went Priority, insured with signature. That is how I have done with all packages and also Christmas gift cards. Everything that was wrapped had an address. I write the address with industrial permanent marker on the outside, then on a card inside and another index card on top of the address outside. I overkill with the tape. DH says I probably pay extra because of the extra ounces of weigh just for the tape. OH well! I do not mark fragile. Anything fragile is in the middle of the box with plenty of packaging around it. I do not write on the box anything like quilt, material or fabric. Only Priority.