Pallas's pika can range from anywhere between 175 and 200 grams (6.2 and 7.1 oz) in weight and can grow up to 25 centimetres (9.8 in) long.

[5] Pallas's pikas are much smaller in body size than other herbivores that usually share the same environment.

Their body size allows them to consume more of the lower level vegetation, giving them more of an advantage over larger herbivores, such as livestock.

They have shown to play a role in not only seed dispersal and vegetation, but the alteration of site conditions.

The Pallas's pika and many other subspecies show a mechanism called microbial nitrogen fixation.

[7] This is a very important mechanism consisting of an isolation of a bacterial community in the cecum and colon of the Pika called the nifH gene.

These essential amino acids are supplied by the microorganisms produced by microbial nitrogen fixations.