When choosing a rectangular cake pan, consider the size, material, and features that best suit your baking needs. Sizes typically range from 9x13 inches to 12x18 inches, and depths can vary from 2 to 3 inches. Aluminum pans are lightweight and heat evenly, while steel pans are more durable and can withstand higher temperatures. Some pans have nonstick coatings for easy release, while others may have textured surfaces for creating decorative cakes.