Originally Posted by JanetM

No, there isn't a pattern. I just measured my Mom's walker across the top bar, and measured down for the length I wanted it to be.
There are so many styles of walkers so you really do need to measure.
Basically, I make an oversized placemat, apply two pockets so one faces my Mom and the other one faces outward. I also attach snaps. It really is very easy to make.