I ran across this idea of using a flat rate shipping envelope from the post office to expand it into a small box. Based on the dimensions, it should fit most pedals. The amounts listed are out of date, it's currently $6.65 for the large flat rate envelope and $6.95 for the legal (slightly longer) flat rate envelope. State to state, I've paid $7.40 for recent pedal shipments and shipping across country can end up approaching $15. I'm going to try building one of these jigs and see how it works. Make $4.75 USPS Flat Rate Shipping Box It could also make International shipping palatable for pedals of higher value. But anyways, this kinda fills the void of shipping pedals flat rate where you don't need the bulk and cost of a medium flat rate box.