Hello Tanya,
Sorry to report, the dimensions supplied by the manufacturer are not correct for this item and we do not have the correct dimensions. I will say it is the typical size of a ceiling fan glass shade, somewhere between 4 and 5 inches long and about 4 inches in diameter at the large end. The small end is made to fit any standard 2 1/4" fan light fitter.
You will see the dimensions listed on some other websites such as Amazon at: 14.6 x 14.6 x 8.5 inches, but I can tell you for a fact that is incorrect.
If you must know the exact size, please give us a call on Monday and one of our customer service agents will be happy to call the manufacturer for you.
Call: 1-800-201-1193
Greg
