We were sitting watching TV one night, at home in Kallaroo, WA, when this huntsman spider (family Sparassidae) suddenly appeared, scuttling along the wall near the ceiling. This is NOT a macro shot – it was a decent sized spider. He would have just about covered the palm of my hand (I didn’t test this theory).
They are not considered dangerous to humans. They will bite if harassed but a bit of pain and swelling is about the worst you would suffer.
There are many species of huntsman in many parts of the world. According to Wikipedia there is a species in Laos that can attain a legspan of 250–300 mm (9.8–11.8 in).
A 12 inch spider? I’d love to meet one someday!