Every sail and cover on this page is cut or sized for the Ross 780, at a fixed published price. Mainsails and genoas are cut in Dimension-Polyant Dacron, and we check your measurements with you before anything is cut.
Illustration. Yours is cut to this boat’s measurements.A 20.9 m² cross-cut Dacron mainsail, cut to the 9.26 m luff and 3.85 m foot, with two reefs. Three leech battens and a full head batten as standard, or four full battens if you want it to stack neatly on the boom.
You choose: cloth (Optimum Cruise or C-Breeze), battens, build time.
Illustration. Yours is cut to this boat’s measurements.Cut for the 8.51 m × 2.65 m fore-triangle, with a Sunbrella UV cover sewn in V138 thread. Pick 110% LP for a breezy home port, up to 150% for light-air sailing.
You choose: cloth (Optimum Cruise or C-Breeze), size (110%–150% LP), UV cover colour, build time.
Each one is matched to the Ross 780. The link opens it with the right size selected.
Racing with a pole? Symmetric spinnakers from A$1,448.70
Every Ross 780 price in your inbox: mainsail and genoa in each cloth, the spinnaker, sock, storm sails and canvas, plus the rig dimensions.
| Measurement | Metres | Feet |
|---|---|---|
| I (fore-triangle height) | 8.51 | 27.9 |
| J (fore-triangle base) | 2.65 | 8.7 |
| P (mainsail luff) | 9.26 | 30.4 |
| E (mainsail foot) | 3.85 | 12.6 |
| Mainsail area | 20.9 m² | 225 ft² |
| Fore-triangle area | 11.3 m² | 121 ft² |
| Length overall (approx.) | 7.32 | 24 |
We confirm your measurements before anything is cut. Different numbers on your boat? Ask us and we will price it to your rig.
From A$1,768.80 in Dimension-Polyant Optimum Cruise with 3 leech battens and a full-length head batten, or A$1,947 with 4 full battens. C-Breeze, the long-life cloth, starts at A$2,004.20. Every mainsail is cut to the Ross 780 rig (P 9.26 m, E 3.85 m) with two reefs.
We build 110% to 150% LP for the standard rig (I 8.51 m, J 2.65 m). Pick a smaller genoa for a windy home port and a larger one for light-air sailing. Furling genoas start at A$936.10.
A Size 00 (27 m²) asymmetric suits the Ross 780 fore-triangle. It starts at A$896.50, or A$1,421.20 with a dousing sock.
The Offshore Special Regulations cap a storm jib at 5% of I squared (3.6 m² here) and a trysail at 17.5% of P × E (6.2 m²). That makes our Extra Small (3 m²) storm jib and Small (6.1 m²) trysail the right sizes.
Measure I, J, P and E and compare them with the rig table. We confirm every measurement with you before the sail is cut.
Still have a question? Ask a sailmaker
For a race programme, a Sydney to Hobart or a bluewater expedition, our sister loft Kraken Sails designs laminates, membrane sails and storm wardrobes for the hard end of sailing.
