Sheet pans come in a variety of sizes so use the size called for in your recipe. A quarter sheet pan is 9 x 13 inches, a half sheet pan is 18 x 13 inches, and a full sheet pan is 26 x 18 inches. A jelly roll pan is 15 x 10 inches. u003cbr/u003eOften a Texas sheet cake is baked in a half sheet pan but u003cstrongu003ethis recipe makes a smaller cake, 15 x 10 inches (jelly roll pan).u003c/strongu003e