What size lamp shade should I buy ?

The right lamp shade should look proportional to your lamp base and so choosing the near correct size is important. You do not want your lampshade to look smaller or bigger than your base and so a careful selection is important. 8 inch, 10 inch, 12 in lamp shades may be best suited for table lamps which 14 inch, 16 inch, 18 inch shades may work well for floor lamps.