This Square Bell Cut Corner Bell Basic lamp shade is a part of Royal Designs, Inc. Timeless Basic Shade Collection and is perfect for anyone who is looking for a traditional yet stunning lamp shade. Perfect for updating or repairing an antique or cherished home lamp. Royal Designs has been in the lamp shade business since 1993 with their multiple shade lines that exemplify handcrafted quality and value. Height is measured by slant height from top to bottom of the lampshades? front face. Measurements listed as (TOP x BOTTOM x HEIGHT). Please measure your existing shade--a replacement harp may be needed for a proper fit or additional adjustment if changing height of shade.