If is just a hogue slip on and it fits about all full size pistols. they even make a tiny one for pocket autos. I just have big hands and even with the fat backstrap I like a little more and anyway I prefer the soft rubber to the sharp points, you can't tell but on the glock I have the stick on rubber pads. I just wish you could get a laser recoil rod for the FNP like I have on the Glock.
Just found out something cool at least to me. After taking these pictures I tried to insert my FNP-45 into my favorite Flock 21 holster the Don HumeH20 OT 41 Paddle. and it went VERY tight though. So I took a soft cloth type bathrag and wrapped it around the FN and forced it real hard into the holster. Left it for 3 days and I now have a new favorite. Fits perfectly and I can stop waiting for someone to make a good leather paddle.