Small tailed rodent body length from 6.5 to 9.5 cm. The tail is at least 60% relative to the length of the body is covered with horny scales arranged annularly and rare short hairs. Weight - 12-30, the rounded ears, small. The skin is dark or brownish-gray; abdomen - from ash-gray to white. A desert mouse color bright, yellowish sand, white belly. Among domesticated are white, black, yellow, blue-gray and pёstrookrashennye individual. Females have 5 pairs of nipples. Sexual dimorphism is weak.