Bobak marmots are large rodents that can weigh between 5 to 8 kilograms (11 to 18 pounds) and measure around 50 to 65 centimetres (20 to 26 inches) in body length. They have a distinctive fur coat that varies from greyish-brown to reddish-brown, which helps them blend into their natural surroundings. Their robust body is complemented by short, strong legs and a bushy tail that can measure about 10 to 15 centimetres in length. Notable features include their large, rounded ears and sharp claws, which are equipped for digging.