Unlike other species of hamster (see 'Golden hamster'), Roborovski hamsters can sometimes be kept in same-sex pairs or small groups if raised together from a young age. A lone, or pair of Roborovski hamsters should be kept in a cage ideally 50 x 100 cm, or the equivalent of 0.5sq metres with at least 15–20 cm of substrate, so that they may exercise their natural urge to burrow. However, greater floor space and substrate depth is recommended for "all" species of hamsters, where ""bigger is always better"" . Additional levels do not count toward the base area. Aquariums and DIY-enclosures are commonly used amongst hamster enthusiasts, often preferred for their capability to hold greater amounts of substrate, wide availability, and cost, amongst various other reasons, over their more traditional wire-cage counterparts (See images for examples).