It measures 6″ in diameter and the face measures 4 1/2″ in diameter. It is in very good condition cosmetically and appears to be in working condition. It has a hand adjustable marking point, and the pointer on the barometer moves away from the marking point as the pressure changes.The item “Vtg Sturm Veranderlich Bestandig German Barometer, Oak, Brass & Beveled Glass” is in sale since Saturday, September 20, 2014. This item is in the category “Collectibles\Science & Medicine (1930-Now)\Scientific Instruments\Barometers”. The seller is “three-d” and is located in Saylorsburg, Pennsylvania.