International One Meter 
The International One Metre class is the fastest-growing class in the world. This class is distinct and different in purpose from the US One Meter class, and complements the International Marblehead Class as a simpler, less expensive boat. The International class has a one-design rig, and has minimum weights on the keel and overall, and restricts the hull material. The net effect of these differences is that the typical cost spiral of lighter weight, and more expensive materials and manufacturing processes, is arrested. This allows amateur designers and builders a chance to design and build with little concern that they are building in a disadvantage due to weight. This is a feature not found in any existing AMYA class, and is one of the reasons that the class is so popular around the world.
Specifications
LOA: 1000 mm (39.38 in)
Displacement: 4000 g (8.82 lbs)
Max Keel Weight: 2500 g (5.51 lbs)
Draft: 420 mm (15.52 in)
Mast height: 1600 mm (63 in)