For the harp seal, it's currently estimated to be 7.4 million. Grey seals are currently estimated to be in excess of 500,000. Comparatively, in 1980 the harp seal population estimate was about two million, and for the grey seal it was at about 30,000.
The interesting thing is that within the seal populations themselves we are seeing stress indicators. Adult animals were carrying 20 kilos less fat in the month of February, as studied by the Department of Fisheries and Oceans, which shows that their health is deteriorating. Additionally, on average, harp seals are having their first pup 1.7 years later than they were when the population was under five million.