| Length: 3.85m (12ft 8ins) |
| Width: 1.42m (4ft 8ins) |
| Weight: |
| Country: United Kingdom |
| Keel Type: |
| Rig Type: Bermuda Sloop Fractional (with jib) |
| Crew: 1/2 |
| Trapeze: optional |
| Sail Area: sq. m |
| Spinnaker Type: Asymmetric spinnaker |
| Spinnaker Area: 8 sq.m |
| Designer(s): Ian Howlett |
| Design Year: 1965 |
| Builder: Topper |
| Boats Built: 1200 |
Topper’s one hull, five dinghies system.
Topaz Uno is a simple singlehander, Uno+ adds a tiny jib,
Topaz Race has a larger monosail rig,
Duo has a stayed mast, larger sails and a trapeze,
Tres adds an asymmetric spinnaker.
Uno, 3.86sq.m (main only)
Uno+, 5.4sq.m (with jib)
Uno Race, 6.9sq.m (main only)
Duo and Tres, 8.3sq.m (with jib)
| No class association known |