Typically, youth shoulder pads are sized by weight class, so to properly fit youth shoulder pads, itâs important to know your exact weight. Once you have these numbers written down, you can start shopping for new football shoulder pads. SU has a huge selection of youth and adult shoulder pads for every position, age range, and budget, from the top brands like Schutt, Riddell, Douglas, and Bikeâ¦just saying.