i have both old and new 3D and i found 3 line sets that are great for that kite..8 foot for indoor 10, 15, 20 for outdoor 10 beong for 0 tio 2 winds 15 to 20 being for winds 3 to 5 mph..all the lines should be no more then 50#..this is a nice kite for the light winds . it isn really fast moveing.. if your a newbie youll get used to it just be careful with your moves..dont get to crazy as this kite is very responsive