I've made two wooden shipping boxes so far, both for the same guy for his own use (not a parcel package service or air frieght). The set was really three boxes total ,one for each bike and one for the wheels . It was a pretty tough project as far as planing went ,the actual construction was basic.
I found that useing an abs polyfoam packing matt. As bummpers was the way to go. And of course ,pedals were removed ,bars rotated 90 deg and down to fit into smallest space.
It all depends on what you are planing ,if you just want a cardboard box ,ask at the local bike store and they'll set you up . If you want something to ship across the globe then maybe I can help . What are you trying to do?