The giant beaver looked similar to modern beavers, but as the name implies, was considerably larger; it grew over 2.5 m (8 ft 2 in) in length — making it the largest rodent in North America during the last ice age and the largest known beaver. It weighed roughly 60 to 100 kg (130 to 220 lb), the size of a modern black bear.[2] Its hind feet were much larger than in modern beavers, but because soft tissues decay, it is not known whether its tail resembled the tails in modern beavers, and it can only be assumed that its feet were webbed like in modern species.[2]