I have a variety of knee and elbow pads starting at $29, up to $60. POC, RaceFace, IXS and others. New and used. Try some on.
GForm ELine ($79) These are $129 plus tax in most places. I ordered med and Large, and the med fit me better. Also have a small. These are new. Can put these on without removing shoes, a feature that is under rated until you use them.
My thoughts. INCREDIBLY COMFORTABLE for pads that offer so much impact protection. Like landing on pillows, but deceivingly slim. Mine dont move, straps really work.
I am 175lb on mediums. If you are a pro over 160lb, or normal rider over 185lb, the Large will probably fit. The small are likely to fit under 160lb