I can't seem to find pads that are big enough to stay in place around the knee area, they just get pushed down or don't fit. I have rather big legs above the knee.
I have tried these pads so far..

Fox Launch Pro Knee Pad - Best so far, just have to keep pulling them up.
Fox Launch Knee Guard - To long, I'm a short guy.
Fox Launch Shorty Knee Guard - Kept getting pushed below the knee
Six Six One Kyle Strait Knee Guard - Kept getting pushed below the knee

Any suggestions from the other big legged guys out there?