The fuel gauge glass is roughly 3/4" diameter and about 8" long. The knobs on the throttle quadrant are about 2" for the throttle and about 1-1/2" for the mixture. These are guesstimates based on comparing them to nearby items like wing tapes and fuselage tubing. It's been about a year and a half since I rode in the blue/white one, with the "Recall" one on our wing, over downtown St. Louis.

Jim, you're from Il? The pic of the Stearman parked in the grass is at a grass field in Belleville, east of St. Louis.