Montane voles are medium-sized voles, with a total length of 14 to 22 cm (5. 5 to 8. 7 in), including the 2 to 7 cm (0. 79 to 2. 76 in) tail. Adults typically weigh anything from 37 to 85 grams (1. 3 to 3. 0 oz), with males being slightly larger than females, but the actual weight varies considerably with age, geography, and subspecies. The upper body is covered with fur of a dark brownish shade, again with some variation between individuals. The fur is paler on the flanks, and fades to grey or white on the underparts. The tail exhibits the same color variation, with the fur being dark brown to almost black on the upper surface and grey or white below.
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