@edgarblythe,
This was doing the rounds here too.
It's not as big as it looks - but Australian huntsman's leg span does max at 15cm (6 inches)
But we can't be too cocky, Asian huntsman apparently max at 30cm (12 inches).
Hey, do you guys have Stick Insects? We had one inside the house for a few days, it kept the huntsman company on the cornice over the bedroom door.