In reply to Hendofan:
I did it a couple of years ago. I wouldn't like to comment whether there are any sections that would be 'reachy' for someone 5'.
I don't recall any serious immediate exposure on the ridge as such (i.e. where there is lots of air under foot), but I remember sections where I think you could fall a long way if you took a short tumble or slip and then didn't stop. When I did it it was pretty dry up most of the ridge, but of course it could end up under ice or snow.
There is a final snow crest at the end of the ridge to get to the summit, which had a track in it but was exposed on both sides and again a long way down. Crampons and axe out for sure here. I don't know how conditions might vary on that section in terms of cornices, narrowness, etc.
Are you planning to take a rope and small rack? Have you climbed without a guide in the Alps before?