No pressure at all!

If I need to ship an entire bike, I have the LBS prep as they charge a very fair $30, including disassembly and packing materials.

If I need to ship a frame, a bike box is too big. I encase the frame with about $5 pipe insulation, two wooden hub spacers cut to length, and scrounge for a flat screen TV box. 40" screen and up works for most bikes. You can even drop a box of components in the box too, just not rims.