I bought a hundred of these not realizing how small they where. The idea was to use them in Ziploc bags of rolls. Might be too small for that but at $.08 each plus free shipping, I didn't feel too bad about it. I can always double them up.
What I did realize was, a plastic tube for cents with a 50 count in them has just enough room for one, doubled over, at the top.
Might be useful if you're in the tube business.