https://en.bitcoin.it/wiki/Avalon#Chip_Specification

Just so you know, the chips are 7mm x 7mm QFN48 packages. Considering the size and quantity, they may be shipped in reels, though I don't have experience with large chip shipments. Looking around, it seems like a 13" reel would hold 2,000 7x7 QFN chips. So five 13" reels.

Reels would be easy, I'd imagine, since you can just cut the tape into strips, put the strips into anti-static bags, and ship those.