Yep depends on the particular crab. White legs seem to get the biggest among average hermits, I have several that are a few years old and they are almost the size of my finger. I also have a red leg that is about 4-5 inches!!! He is unusual though, most only get to about an inch.
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.