Herreshoff 12 1/2
- Type: Sailboat
- Designer: Nathanael G. Herreshoff
- Cabin: No
- Length: 15'10"
- Beam: 5'10"
- Draft: 2'6"
- Weight
- Displacement: 1500 lbs.
- Ballast: 735 lbs.
- Sails:
- Main: Gaff 140 sq.ft.
- Links:
- Ottawa Small Boat Messabout
- Artisan Boatworks
- H Class Association