They get d10, like all martial classes (barbarians, cavaliers, fighters, paladins and rangers). Clerics and druids get a d8 and assassins, acrobats and thieves get a d6.
In terms of HD, they get: drow d6/d8, duergar d6/d8, dwarf d8/d10, elf d6/d8, gnomes d4/d6, halfling d6, half-elf d6/d8...