The largest railway gauge (the distance between the inner sides of the two rails) currently in regular use is the Broad Gauge, specifically the Indian Gauge (1,676 mm or 5 feet 6 inches). This gauge is the standard for the vast majority of the rail networks in India, Pakistan, Argentina, Chile, and Sri Lanka. It was chosen in the mid-19th century because the extra width provided better stability during high winds and allowed for much wider and more spacious passenger carriages and freight wagons. While there have been "Experimental" or "Grand" gauges in history—such as Isambard Kingdom Brunel's 7-foot gauge (2,140 mm) used by the Great Western Railway in the UK in the 1800s, or the terrifyingly massive 3,000 mm (9 feet 10 inches) "Breitspurbahn" proposed by Nazi Germany—those are no longer in operation. Among modern, functional systems, the Indian 1,676 mm gauge remains the giant of the rails, significantly wider than the "Standard Gauge" (1,435 mm) used in the United States, China, and most of Europe.