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$4,885.10
inc GST
Najad 405 Sails Prices, sail sizes & rig dimensions
8 products cut or sized for this boatI 16.41 · J 4.56 · P 15.51 · E 5.11 mPrices checked 21 Oct 2026
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Every Najad 405 price in your inbox: mainsail and genoa in each cloth, the spinnaker, sock, storm sails and canvas, plus the rig dimensions.
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$4,766.30
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 Najad 405 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 13.5 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 13.9 m²
Luff hardware
Tell us your track size after you order.
A$1,250.70
inc GST
Fits a 5.11 m boom
Canvas
Colour
A$657.80
inc GST
Fits a 5.11 m boom
Canvas
Lazy jacks
Colour
A$1,224.30
inc GST
Not ready to buy yet?
Najad 405 rig dimensions
| Measurement | Metres | Feet |
|---|---|---|
| I (fore-triangle height) | 16.41 | 53.8 |
| J (fore-triangle base) | 4.56 | 15.0 |
| P (mainsail luff) | 15.51 | 50.9 |
| E (mainsail foot) | 5.11 | 16.7 |
| Mainsail area | 46.3 m² | 498 ft² |
| Fore-triangle area | 37.4 m² | 402 ft² |
| Length overall (approx.) | 12.80 | 42 |
We confirm your measurements before anything is cut.
Najad 405 sails: questions
How much is a new mainsail for a Najad 405?
From A$4,885.10 in Dimension-Polyant Optimum Cruise with 3 leech battens and a full-length head batten, or A$5,115 with 4 full battens. C-Breeze, the long-life cloth, starts at A$6,439.40. Every mainsail is cut to the Najad 405 rig (P 15.51 m, E 5.11 m) with two reefs.
What size genoa does a Najad 405 need?
We build 110% to 150% LP for the standard rig (I 16.41 m, J 4.56 m). Pick a smaller genoa for a windy home port and a larger one for light-air sailing. Furling genoas start at A$4,032.60.
What size spinnaker fits a Najad 405?
A Size 8 (94 m²) asymmetric suits the Najad 405 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 Najad 405?
The Offshore Special Regulations cap a storm jib at 5% of I squared (13.5 m² here) and a trysail at 17.5% of P × E (13.9 m²). That makes our Maxi (12 m²) storm jib and Large (10.8 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.