I don't get offended too easily. Look a 6-12 m quiver of switchblades would cover most scenarios from 15 knots for 60 kg 8m 80 kg 10/12, 20 knots 60 kg 6m, 80 kg 8/10 25 knots 60 kg could go on 6m, 80kg would be on 8m. Now if you are using surfboard use smaller kite, if on a tt you can probably hold more power. Guess with limited info can only go by what would work for reasonable intermediate Kiter in WA. Now if rank beginner go and all get lessons before contemplating buying anything.