The above art is the first sketch of the first batch of neckwear. They are; standard leather collar, thick steel collar, sleek silver ring collar, neck ribbon, gold chain, necktie, chocker, and neck bow. There may be some minor alterations, along with a lot of alternate colour versions, however, this is pretty much it for now. The artist Silverjile has graciously cleared me posting the early versions as always.
If you want to see more of their work, you can find it through the following NSFW link here.