I bought the Winco bowl to replace the Brinkmann pan that has been the base for my Piedmont Pan for many years (but now has many rusted pinholes). It arrived today, and was too big to fit into the WSM. The diameter was a little over 16 inches and it would not have fit even if I cut notches in the rim. Maybe Winco has changed suppliers. The information on Amazon lists the diameter correctly, but I didn't check anything but the part number. So be aware that the bowl that worked in the past may not work today.