WordNet sense 1 (short and thick; as e.g. having short legs and heavy musculature):

chunky, dumpy, squat, stumpy, squatty

WordNet sense 2 (low in stature; not tall):

short

WordNet sense 3 (lower than average):

lowset

WordNet sense 4 (literal meanings; being at or having a relatively small elevation or upward extension):

low