Measures 9 inches tall and the viewing hole is around 3 square. I can't find another one like it anywhere. The item "Outstanding 4 Panel kaleidoscope Mirrored Tapered Stained Glass 1989 signed KS" is in sale since Tuesday, December 10, 2019. This item is in the category "Collectibles\Science & Medicine (1930-Now)\Optical\Kaleidoscopes".The seller is "myhometreasures" and is located in Souderton, Pennsylvania. This item can be shipped to United States.