Wooden Base For Kaleidoscopes Medium Slant Base 4 1/2 inches long Cherry Wood. This solid cherry wood base is ideal for kaleidoscopes at least 5 inches long or longer and at least 3/4 inches in diameter or wider. Actual dimensions of this base are approx 4 1/2 inches long by 2 3/8 inches wide by 7/8 inches tall. A brass plate may be added for an additional fee. Brass plate dimensions cannot exceed 4 inches long by 1 1/2 inches tall.