Thicker bread. For slightly thicker slices, such as bagels or ciabatta, choose a model with wider slots.
Levain and similar types of bread. For bread cut into long slices, you'll also need a toaster with long slots (like four-slice toasters).
Croissants. To heat up croissants or a sandwich with toppings, look for toasters with a small stand or a keep-warm function.
Grilled cheese sandwich. Avoid a grilled cheese meltdown by using toaster bags and ensuring your toaster has wide enough slots.