"Both genders of half-orc stand between 6 and 7 feet tall..." (Core Rulebook, page 25)
But the random height-weight table on page 170, and reprinted in the Advanced Race Guide, says:
"Half-orc, male 4 ft. 10 in. ... 2d12
Half-orc, female 4 ft. 5 in. ... 2d12"
which means female half-orcs would range from 4'7" to 6'5", with a median height of 5'6". Males would range from 5'0" to 6'10", with a median height of 5'11".
This came up because a player was disappointed to roll a 5'4", which is actually almost in the middle of the female range. I told her to just pick whatever height she wanted :)
