Grate area is 240 sq". It comes with 8 hooks for hanging but at times I foil my pizza stone and place a can of beer inside the birds and use the grate level. The pizza stone is 18". I've never actually measured the grate. A 240 sq" circle would have a radius approaching 8.8+ so D=2r so approx 18" grate.
Primo XL, Pit Barrel Cooker, Mini WSM,Lodge Hibachi
Craigslist finds Tiernan SOB, New Braunfels Black Diamond, Big Green Egg Mini
By the way, did she mention my name-just in passing?