They are slightly smaller than the stock seats. I got the "wide" version which is about 1.5" wider at the hips and shoulders than the normal one. The back area is actually slightly shorter than the stock seats. I have mine mounted on the stock seat brackets so they sit at the same height as the stock seats.

 

i think its the sides, that throws it off for me. im just so confused on what i wanna do, i want to use some lighter seats, but not sure what seats to go with ! i might just get some damn kirkey seats and swap them out for race days lol.