I had emailed the manufacturer to know the size of letters, and they did not answer me! After reading the comments of German customers on different sites, I took size L 175 cm and 70 kg, they are ideal (over clothing, jeans and sweatshirts). The plastic is thick and not too heavy. Elbow pads are a little stiff at first, but you get done quickly. They do not slip thanks to elastic Velcro. Now it has more ...