Thanks.I use to shape my skew as Alan does but gone away from that because it is so much easier to go to grinder and a quick pass on stone straight across is so easy to do. Occasionally I will hone but find the grinder quicker and easier.
Size, I suggest 3/4" to 1" these keep the center cutting edge away from the points on the skew which can cause tearout and lots of havoc. Also stay away from the rounded skews or oval skews. Harder to control. But make sure the edges are rounded to avoid dig in into your rest. I use Robert Sorby skews and get them at Craft Supply USA. This is just my preferences.
https://www.woodturnerscatalog.com/p/130/3400/robert-sorby-M2-HSS-Skew-Chisel?term=robert+sorby+skews&term=robert sorby skews
Yes. It is so it will slide across the tool rest at the desired angle you need. That was why I was recommending you watch the video, so you pick up on all the subtleties of using the skew. I literally have watched it 5 times prior to using the skew and several times sense.thanks! Is there a reason the rounded edge is better, or necessary?