The One-Touch series by Weber is a charcoal grill series with grills that come in a few sizes, including 22.5 inches. The size refers to the grilling area, and so the grill grate also measures 22.5 inches. The 22.5 inch kettle grill is the largest size among the One-Touch grills for the most part. Only one out of the three classes in this series has a larger grill and that is the Gold series. It has a 26 inch grill as well. The Platinum and Silver series on the other hand do not have that size.