Excellent performance - Aluminum pans provide even heat distribution as well as quick heating and cooling </br> Convenient - Great for cooking large amounts of food </br> Lightweight - Easy to move around </br> Galvanized wire edge - 1.0 mm thick rim that prevents warping and keeps the pan flat </br> Sturdy - Each tray is 18 gauge commercial grade aluminum (beware of thinner models) </br> Includes: </br> 12 - quarter sheet baking pans - Actual size: 9.5" x 13"