If you are looking for a thoroughly relaxing full body massage, I highly recommend going an hour and a half. Especially if you want to do stretching. One hour is fine, but I can do a much more thorough job with that extra 30 minutes. Shorter amounts of time than one hour are ideal if you just need one or two areas worked on. Several of my clients love to go a full 2 hours which is practically a mini vacation. Two and a half hours is the longest amount of time I have done a massage, and I did it twice in one day!