For comparision, Gimli, son of Gloin, was 139 at the start of the Fellowship. And Thorin is 195 (the oldest of the dwarven party) when he dies at the end of The Hobbit. All the other dwarves shown so far look like dwarves, Kili and Fili look like they could be Men or in Kili's case, an Elf.
They've released the picture of Thorin Oakenshield. And instead of looking like the old dwarf he's supposed to be, he looks like a KLINGON!!!! At least Orcrist looks good.