No, I don't know of a site, but I think you could figure it out by just looking at the price relative to the shares outstanding (or if there is a huge restricted, the float). For example, I don't like to buy anything with an outstanding over a billion although a lot of people on ihub do. But say there is a triple zero stock with an os under 500M, I would consider that a decent size. But if you showed me a five cent stock with an os of that size I wouldn't like it. It is all relative the price it is trading at.
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