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$1,461.90
inc GST
Kirby 8M Sails Prices, sail sizes & rig dimensions
7 products cut or sized for this boatI 10.52 · J 3.29 · P 9.08 · E 2.90 mPrices checked 22 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$1,805.10
inc GST
Sized for this boatRacing with a pole? Symmetric spinnakers from A$1,448.70
Asymmetric spinnaker
Asymmetric Spinnaker · Size 2 (43 m²)
Matched to the Kirby 8M fore-triangle · 0.9 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$1,406.90
inc GST
Fits the Size 2 spinnaker
Dousing sock
Spinnaker Dousing Sock · 10.1 m
UV-resistant ripstop nylon sock to hoist and douse the spinnaker from the deck
Outer tube
Inner tube
A$629.20
inc GST
OSR max 5.5 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$621.50
inc GST
Fits a 2.90 m boom
Canvas
Colour
A$358.60
inc GST
Fits a 2.90 m boom
Canvas
Lazy jacks
Colour
A$713.90
inc GST
Custom quote
Storm trysail
Made to order
This rig’s P × E is 26.3 m², below our smallest stock trysail (Small needs 34.9 m²). We’ll quote one to fit.
Get the price list
Every Kirby 8M 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?
Kirby 8M rig dimensions
| Measurement | Metres | Feet |
|---|---|---|
| I (fore-triangle height) | 10.52 | 34.5 |
| J (fore-triangle base) | 3.29 | 10.8 |
| P (mainsail luff) | 9.08 | 29.8 |
| E (mainsail foot) | 2.90 | 9.5 |
| Mainsail area | 15.4 m² | 166 ft² |
| Fore-triangle area | 17.3 m² | 186 ft² |
| Length overall (approx.) | 8.23 | 27 |
We confirm your measurements before anything is cut.
Kirby 8M sails: questions
How much is a new mainsail for a Kirby 8M?
From A$1,461.90 in Dimension-Polyant Optimum Cruise with 3 leech battens and a full-length head batten, or A$1,600.50 with 4 full battens. C-Breeze, the long-life cloth, starts at A$1,952.50. Every mainsail is cut to the Kirby 8M rig (P 9.08 m, E 2.90 m) with two reefs.
What size genoa does a Kirby 8M need?
We build 110% to 150% LP for the standard rig (I 10.52 m, J 3.29 m). Pick a smaller genoa for a windy home port and a larger one for light-air sailing. Furling genoas start at A$1,527.90.
What size spinnaker fits a Kirby 8M?
A Size 2 (43 m²) asymmetric suits the Kirby 8M fore-triangle. It starts at A$1,406.90, or A$2,036.10 with a dousing sock.
What size storm jib and trysail fit a Kirby 8M?
The Offshore Special Regulations cap a storm jib at 5% of I squared (5.5 m² here) and a trysail at 17.5% of P × E (4.6 m²). That makes our Small (4.5 m²) storm jib the right size. No stock trysail is small enough for this rig, so we quote one to fit.
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.