All Kritter Keepers® have well-ventilated lids in assorted colors and may be used as space-saving aquariums or insect havens, but are also ideal for use as small animal keepers, kritter totes, terrariums or nurseries. Rectangular Kritter Keepers® have self-locking lids with hinged viewer / feeder windows, an airline access hole and an attachment hole (except Mini and Small sizes). The Mini, Small and Medium sizes have carrying handles for easy transport. - Size : 11 3/4" L x 7 3/4" W x 8" H - Capacity : 1.75 Gallons *lids come in an assortment of random colors.