I ordered 15 records from LNT, and they shipped them in 4" thick boxes (at least I think they were 4"...the larger boxes that VMP used to use)...they arrived in excellent shape, and had come all the way from the UK. I'd probably pack them fairly tightly, and put some cardboard pieces in the box to add some shock absorption. And ship UPS or FedEx since USPS is being slow (which means more opportunity for damage)