Constructed of 18 gauge aluminum with a wire in rim and .125" diameter bottom perforations, this StayFlat® Sheet Pan is a full-size, commercial-grade baking pan engineered for durability and precision. The StayFlat® technology increases pan strength and longevity through sidewalls that are continuously reinforced with a horizontal engineered rib. This pan’s overall size is 25-13/16" x 17-7/8" x 1".