12" across the top x 18" across the bottom x 18" on the slant x 17 1/2" high. From the Springcrest brand of lamp shades. Bell-shaped lamp shade, creme white color, 100-percent polyester material, scalloped edges top and bottom. Polyester, nylon blend inner liner. Polished brass spider fitting with 4" drop. The correct size harp is included free with this shade. The traditional bell shade gets an update with a gentle scallop design at the top and bottom. Premium creme polyester outer fabric with matching braid trim and an inner poly/nylon blend lining. High quality hardware includes a polished brass spider fitting with 4" drop.