Mine are the same size as Larry's Male is 2" and the females are 1.5". I have a 100 gal tank that I have 4 Burundi Frontosa's, 4 Mpimbwe Frontosa's, 3 FM Compressiceps, 2 Leleupi's, 1 M Bushy nose Pleco, 1 adult Featherfin Catfish, and 1M and 6 FM white Calvus. With white silica sand with Texas holey rock, and fake plants. Ill get a picture of it this weekend.
Yea my cavus and compressiceps move alot of sand under the rocks, I use to have an adult inkfin calvus that a rock collapsed on it and killed it.