Recommendations for gerbil cage size based on cage space requirements for hamsters in the Animal Welfare Act Regulations:

Weight (g)

Minimum floor space per animal*

Interior height
 

in2

cm2

  

<60

10

64.52

6

60 to 80

13

83.88

6

80 to 100

16

103.23

6

>100

19

122.59

6

*A nursing female gerbil, together with her litter, shall be housed in a primary enclosure that contains no other gerbils and that provides at least 121 square inches of floor space: Provided, however, that in the case of nursing female dwarf gerbils such floor space shall be at least 25 square inches.

Animal Welfare Act Regulations, Subpart B--Specifications for the Humane Handling, Care, Treatment, and Transportation of Guinea Pigs and Hamsters, Sec. 3.28 Primary enclosures.