Half-sheet pans are typically offered as uncoated (natural) aluminum or aluminum with nonstick coatings. Some nonstick finishes are marketed as PFAS‑ and PTFE‑free. Many sets also include steel grids or racks, which may be coated and can have different oven limits than the pan itself.
Typical exterior dimensions are about 17.9 × 12.9 inches (depth × width) with roughly a 1‑inch rim height. As an example of usable surface, some listings show interior dimensions around 16.5 × 11.38 × 1 inches; exact interior size varies by model.
Design features that reduce warping include reinforced or encapsulated metal rims (sometimes galvanized steel), embossed or textured pan surfaces, and heavier‑gauge construction—each adds rigidity to resist heat‑ or load‑related distortion.
Most product guidance recommends hand washing and avoiding abrasive cleaners or scouring pads to protect nonstick coatings and the pan finish. Many manufacturers advise against dishwasher use to preserve the pan's longevity and coating.
Aluminum half-sheet pans provide good thermal conductivity for even heat distribution, reduced hot spots, and more uniform browning—traits that support consistent baking and roasting results.
An embossed or textured surface adds rigidity to the pan and can aid food release. An included grid or rack elevates food slightly to improve air and heat circulation, which helps crisping, more even browning, and easier draining or release.