The Subsaharan Pygmy Mouse is a very small mouse. At Chappal Waddi in Nigeria, it was common in savanna grassland and less common in the forest zone.
Specimens from Chappal Waddi measured 58–60 mm from head to body and weighed 5.2–6.9 g.
At Chappal Waddi, 1,900 m above sea level, the authors found it common in savanna grassland but uncommon in the forest zone.
An extinction-risk assessment has not been added yet.