These storage boxes were adequate for the 2x2 flips, but there was an odor to them -- not overwhelming by any means but still a little obnoxious. Maybe they will air out over time, but the odor seems to be coming from exterior coating on box. Hopefully any fuming will not affect coins inside. Will probably order something different next time.

Coin Supply Express offers the best prices I've found for these 9" 2x2 boxes !!!

Perfect for 100 pennys in 2x2 flips.

Theis boxes are strong and well made , so far they last a long time.

I found the 9" 2x2 an all around good size to store my 2x2 and flippers in.

The larger size was just too much, unless you get the one with the divider than you are set. I would take a size shorter, say 6" if I choose again.

note.: You can place the two nine inch 2x2 boxes in one Proof set holder to make space more efficient for you.