http://www.tamriel-rebuilt.org/?p=conceptart§ion=15266
So, which breed of Khajiit do you think will be used in Skyrim? Maybe more than one will appear? Maybe the ones that walk on all fours and/or are larger than your average door frame?
Quick summary:
Ohmes: elvish like, no tail, little to no fur, usually tattoed, possibly the breed from Arena
Ohmes-raht: tail and light fur, walks on heels like humans, possibly the breed from Daggerfall
Suthay: probably the Oblivion breed
Suthay-raht: the Morrowind breed, walks on
We haven't actually seen any other breeds in any game AFAIK
Cathay and Cathay-raht: these may look like jaguars or leopards, and are on the 'menacing' side of the size scale, probably rivaling with the bigger nords.
Read the article for more info.The rest are all probably quadrupedal, and range from a house cat to '20 altmer' in size