Made to measureIllustration. Yours is cut to this boat’s measurements.Cloth
Battens
Build time
Express +8%, economy 5.5% off. Shown as its own line in your cart.
A$5,601.20
inc GST
J/40 Sails Prices, sail sizes & rig dimensions
8 products cut or sized for this boatI 16.79 · J 4.72 · P 16.18 · E 5.62 mPrices checked 21 Oct 2026
Made to measureIllustration. Yours is cut to this boat’s measurements.
Made to measureIllustration. Yours is cut to this boat’s measurements.Cloth
Size (LP)
UV cover colour: Captain Navy
Build time
Express +8%, economy 5.5% off. Shown as its own line in your cart.
A$5,045.70
inc GST
Sized for this boatRacing with a pole? Symmetric spinnakers from A$1,448.70
Asymmetric spinnaker
Asymmetric Spinnaker · Size 8 (94 m²)
Matched to the J/40 fore-triangle · 1.5 oz nylon · 11 colours
Spinnaker cloth colour: White
Sock outer tube
Sock inner tube
The sock goes in your cart as its own line, linked to this spinnaker.
A$2,656.50
inc GST
Fits the Size 8 spinnaker
Dousing sock
Spinnaker Dousing Sock · 14.6 m
UV-resistant ripstop nylon sock to hoist and douse the spinnaker from the deck
Outer tube
Inner tube
A$946
inc GST
OSR max 14.1 m²Luff attachment
Luff tape relies on a foil, so it does not meet the OSR luff-attachment rule. Choose hanks or wrap luff for offshore racing.
A$1,391.50
inc GST
OSR max 15.9 m²
Luff hardware
Tell us your track size after you order.
A$1,786.40
inc GST
Fits a 5.62 m boom
Canvas
Colour
A$717.20
inc GST
Fits a 5.62 m boom
Canvas
Lazy jacks
Colour
A$1,326.60
inc GST
Get the price list
Every J/40 price on one printable page: mainsail and genoa in each cloth, the spinnaker, sock, storm sails and canvas, plus the rig dimensions.
Not ready to buy yet?
J/40 rig dimensions
| Measurement | Metres | Feet |
|---|---|---|
| I (fore-triangle height) | 16.79 | 55.1 |
| J (fore-triangle base) | 4.72 | 15.5 |
| P (mainsail luff) | 16.18 | 53.1 |
| E (mainsail foot) | 5.62 | 18.4 |
| Mainsail area | 53.2 m² | 572 ft² |
| Fore-triangle area | 39.6 m² | 426 ft² |
| Length overall (approx.) | 13.11 | 43 |
We confirm your measurements before anything is cut.
J/40 sails: questions
How much is a new mainsail for a J/40?
From A$5,601.20 in Dimension-Polyant Optimum Cruise with 3 leech battens and a full-length head batten, or A$5,852 with 4 full battens. C-Breeze, the long-life cloth, starts at A$7,385.40. Every mainsail is cut to the J/40 rig (P 16.18 m, E 5.62 m) with two reefs.
What size genoa does a J/40 need?
We build 110% to 150% LP for the standard rig (I 16.79 m, J 4.72 m). Pick a smaller genoa for a windy home port and a larger one for light-air sailing. Furling genoas start at A$4,269.10.
What size spinnaker fits a J/40?
A Size 8 (94 m²) asymmetric suits the J/40 fore-triangle. It starts at A$2,656.50, or A$3,602.50 with a dousing sock.
What size storm jib and trysail fit a J/40?
The Offshore Special Regulations cap a storm jib at 5% of I squared (14.1 m² here) and a trysail at 17.5% of P × E (15.9 m²). That makes our Maxi (12 m²) storm jib and Maxi (15.5 m²) trysail the right sizes.
How do I check my boat matches these measurements?
Measure I, J, P and E and compare them with the rig table. We confirm every measurement with you before the sail is cut.
From the same loft
Racing offshore or heading somewhere remote?
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.