I do something similar, and once I run out of materials I'll do it right in the sense of saving myself time and not abusing postal materials. Currently, I'm folding the tie in half once, then in thirds and putting it in a 6x9 bag, the bag then goes into a USPS Small flat rate box. The box gets one piece of tape for extra support. From there, I cut a 14.5x19" tyvek back right down the seams so I have a flat piece of tyvek to wrap the box like a Christmas gift. It folds perfectly. I had originally bought 100 of these 14.5x19's for suits, but I find it much more effective doing individual parts into 12x15.5 so I really don't use them other than for the very rare super thick jacket. Once I'm out of the 14.5x19's I'll buy the uline 6x3x3 boxes, and do the same but without wrapping the outside. Tie into 6x9, 6x9 into uline box. Tape box, attach label, off it goes.