BARLING: Marylebone Guinea Grain (1817)(9mm) Tobacco Pipe. Measurements / Other Details. Length: 5.95 in. / 151.31 mm. Weight: 1.40 oz / 39.69 g. Bowl Height: 1.86 in. / 47.24 mm. Chamber Depth: 1.49 in. / 37.85 mm. Chamber Diameter: 0.83 in. / 21.08 mm. Outside Diameter: 1.60 in. / 40.64 mm.