4.5" diameter semi-clear pre-punched deli cups are perfect for temporarily housing small animals when complete clarity of the cup isn't that important (e.g. when you want to ship your reptiles). A cup that is a little bit of a snug fit for your animal is better than one that allows too much room, as everything is bound to be jostled around in transit (excessive room allows greater chance of injury as the animal can bounce around more inside the cup).