I'm 6'2" over 200lbs, 45 years old. I went with the 44" extra strong. I've had it about a month and I do 20 minutes a day. I truly look forward to it (unlike other forms of exercise). I feel like I have to do it every day and always plan for it, whether it's early morning or after work. I always feel better afterwards. It's easy on the joints and I can just picture the lymph flowing. I like bouncing outdoors, but indoors is cool too when the weather is bad. No excuses! My daughter loves it too. Looking forward to rebounding for a long time to come.