If you'll notice in this picture, it's rounded on the edges. So it basically fits any uncovered HB, but not perfectly rectangular pickups. I bought sight unseen and didn't realize there would be a difference.Confused - I can't think of any distinction between PAF and any other dual-coil side by side humbucker (other than the obvious difference that a real vintage PAF is worth a few grand). Wouldn't any humbucker mounting ring or pickguard cutout be sized to fit a Patent-Applied-For humbucker or it's progeny? Not sure what you meant by "rounded edges." Anyway Warmoth makes pickguards to order from a pretty large selection of materials and their tortoise shell is pretty sweet.