Base is exactly 7 3/8 inch in diameter for a 7 1/2 Student Lamp Shade Ring.
Original Antique Blown White Glass Shade is Bell shape, compared to the usual Slant Shades. With a nice Rolled-Over Top edge, and normal rough cut & rough polished bottom edge.
Stands 5 3/8 inches High. Top of Outside Glass is 4 and the and the inside flue opening is 2 1/2 inches.
Weighs 1 Pound and 0.7 Ounces.