Hello, thanks for reaching out! The height of the glass is 12-3/8 " with a 9-3/4" diameter. The manufacturer doesn't list a minimum height, but it has a wire length maximum of 120 inches. I'll copy in some of the specs as well as a diagram below. Let us know if you have any more questions!

Dimensions: Ø9 7/8" x 12 3/8"H
Lamping: Max. 1 x 60W Medium Base-E26 120V
Colour: Clear
Cord Color: Black
Canopy: Ø5 1/2" x 1"H
Wire Length: 120" Max.
Location: Dry
Weight(Shipping): 6 lbs, 2.7 kg