If I remember right the prices were from 39 to 69. The one pictured above is about 4" or 100mm. They did have smaller ones approx. 2" length that have very nice color. Its hard to pick a clam looking thru the side of the tank
Thru the side it is blue and from the top it is green.
Don't quote me on the prices as I wasn't really paying much attention when told.