A USA Pan extra large sheet pan. Aluminized steel with Americoat silicone nonstick. Baking surface 20.25" x 14.25" x 1"; outer 20.75" x 14.75" x 1". Corrugated floor; steel-wire rim. Oven-safe to 450°F. Silicone, nylon, or wooden utensils only. Limited lifetime warranty. USA Pan's FAQ lists Americoat as a silicone coating made without PTFE, PFOA, PFOS, PFAS, and BPA.
Bigger than a half sheet. Check that it fits your oven before you buy it for a full-size home range.