NO. DON'T DO IT
I just recently ordered these pads and am immediately returning them. these things are HUGE!! more like leg pads to be honest. not only are they really really big, they are also really really tight. I have pretty thin legs and I literally could not walk or move and they were cutting off my circulation. I'm sure these pads would make sure you don't hurt your knees but there is no mobility and they will NOT fit in pants.