There are 3 connection points between your body and your bicycle.
one of them is the saddle. Whilst shoes and Handlebars are a bit more difficult to try different ones we are part of Pologo's and Fizik's saddle testing program.
We will make an assumption in the shop which saddle might be the one for you, mount it to your ride, you leave 50 Euro deposit and go on a ride. After you have ridden the saddle long enough to judge if it fits you or not, you can come back and we either switch the saddle to another test saddle or you are happy with it and we order it for you. We promise we will not give up before we found your saddle.