I inquired at my PO - two things, the cost that went from $4.90 to $4.95, and the clerk stated that if it fits, it ships, as long as I don't have to use extra tape to reinforce. I fold the blocks individually so for the most part, they are not bulging. Now, the flat rate BOX went from $4.95 to %5.20, and I bet that I could still get two sets of 12 blocks in that.