Britannica Sources used in this answer

How large can the biggest adult harp seals become?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

The largest adult harp seals can reach a weight of 180 kg (400 pounds). While average-sized adults of both sexes measure 1.8 metres (6 feet) in length, these maximum weights represent the upper end of the species' size range.1