Very pleasant training fins that give a lot of fun. Optics is kept simple, which makes them not so well auffallen..ist better so :) If one is confident in his shoe size, or already know what size you have in flippers, then you can order them directly online. Otherwise, prefer to go into business and attract sample. Flippers can be quickly uncomfortable if they are too tight or too loose. To me they fit properly (size 44, shoe size at 44.5). Since making a swimming also much more enjoyable. So who wants to improve his stamina and technique ACCESS !!!