Soliciting your help for lampshade size and shape -- I'm leaning toward a shape resembling an Asian conical hat, but I always have a mental block when it comes to selecting lampshades (or picture frames).

The floor lamp in the photo is 58-inches high. The lamp column narrows 8-inches from the top, where the bulbs go. I happened to have a shade (11-inches high by 16-inches bottom diameter) that I stuck on just for a general idea of sizing. Do I need larger... smaller?

(I don't know how to upload multiple images, so it will be in a following post. And what's up with tiny pic? It no longer works for me.)