It's a funny size actually - 15" from the bottom bracket to the centre of the top-tube, but 17" to the top of the seat-tube. Orange called it a 17", but the standover and overall size is slightly smaller IMO.
My girlfriend is 5'4", and was fine riding it - but the stem was a bit long for her. I'd say it would be suitable for someone up to about 5'9"ish.
But the best way to tell would be to try it.