Floating Chair Dimensions:Children's floating chair, diameter 6.5CM* length 150CM (used under 80 catties);Adult floating chair, diameter 7CM*length 160CM (for use under 150 catties);A single set weighs 130 grams;Instructions for use: Using a swimming chair requires some skills. You must learn to master your balance. You can't just sit up and float. You need to sit firmly, move your hands and feet, and maintain a good center of gravity. Balance is very important. To the side or sink, generally sit up to the water level as to the chest.