You will find all lampshade shapes, sizes and prices on the drop down menu on all lampshade listings.
The top and bottom rings are the same size. Sides are straight (no tapering)
Bottom ring is slightly wider than the top ring - Giving a slightly tapered appearance.
The top ring is much smaller than the bottom ring - producing tapered sides.
Sqaure lampshades with slightly rounded corners.
Rectangle lampshades with Slightly rounded corners