Erk, it's 15.25" wide in the front and 12" wide in the back. The newer ones aren't contoured, so that'd be a better bet. But last I checked, the later versions of the seats retailed for $650 or so. A wise seat from Academy or Overtons might be a cheaper option.
Previous: 1993 Prostar 205
Red 1998 Ski Nautique, PCM GT40, 310 hp, , Acme 4 blade, Perfect Pass SG/Zbox.
Be kind. Have fun.