Griddle Size: The right griddle for you needs to give you the space you want both in griddle space as well as the grill space. You can get a griddle that covers the entire grill area or a smaller griddle that leaves you with room to grill as well. If you have a small grill you'll probably want a full size griddle but if you have a large grill surface you might want to leave some space for grilling while you have the griddle on the grill. You can generally find griddles in many different shapes and sizes. Have a kettle style charcoal grill? There are round griddles to fit it.