An Extra Large pizza typically measures around 16 to 18 inches in diameter, making it larger than standard sizes like medium or large. This size is ideal for feeding a group, as it usually contains more slices, often ranging from 12 to 16, depending on how it is cut. The crust can vary in thickness, from thin and crispy to thick and chewy, allowing for different toppings and styles. Common toppings include pepperoni, mushrooms, bell peppers, and extra cheese, catering to various tastes and preferences.