Mat 12
MAT · Mark Mills · 2006
Updated
The Mat 12 is a 12.45 m displacement racing yacht designed by Mark Mills and built by MAT, first launched in 2006. It races in Class B.
Length
12.45 m
40′ 10″
Beam
3.78 m
Draft
2.60 m
Displacement
7.4 t
Sail area
101 m²
On the podium
Where a Mat 12 finishes when she goes racing.
On the podium
15%
of 13 starts by 1 boat
Wins
0%
Read from 13 starts by 1 boat between 2025 and 2026, counting races with six boats or more.
Recent regattas
The latest events where a Mat 12 was on the start line, named as the organisers publish them.
EAYK-TAYK Dogu Ege Yat Sampiyonasi2026- Bosphorus Cup2025
Raced one we are missing?
Report a regattaRound the buoys, or offshore
A short windward-leeward and a night at sea ask different things of a boat. Here is how this one does in each.
Round the buoys
20%
of these races end on the podium
Offshore & coastal
—
Not enough data yet: 1 race over 10 NM carry a published distance.
Who she races against
The designs a Mat 12 actually lines up with, most often first. The bar shows how those meetings ended.
Also met, too few times for a figure:
Farr 55 (7 meetings), Cape 31 (7 meetings), Vismara 46 (7 meetings), First 44.7 (7 meetings), First 34.7 (7 meetings), Bavaria Match 42 (7 meetings), Swan 42 (6 meetings), JPK 11.80 (6 meetings), Rodman 42 (6 meetings), First 45 (Briand) (6 meetings), Sinergia 40 (6 meetings), Xp 33 (6 meetings), Elan 410 (6 meetings), Mat 107 (6 meetings), Bolt 37 (6 meetings), Farr 280 (6 meetings)
Some of the boats it races against
How the Mat 12 has fared against each of them, boat against boat on corrected time. Ordered by how often the two meet, not by who wins.
Speed at every angle
The shape of this design's speed, drawn from the measured fleet. Pick a wind and watch it stretch.
Upwind VMG
5.95
36°
Beam reach
9.23
90°
Broad reach
10.90
135°
Downwind VMG
8.89
170°
Speed in knots at 20 knots of true wind. Green marks the angles that pay: the closest useful beat and the deepest run worth sailing.
Where it wins and where it pays
Every boat is judged against its own measurements — length, weight, sail area. The quicker those say it should be, the more it has to deliver just to break even. Going fast is not enough: it has to go faster than its own numbers promised.
This design is even-tempered. It rewards preparation and crew work more than it rewards picking the right day.
Where it gains
Its best ground is downwind in a strong breeze, where it goes better than its measurements say it should, and by a margin worth having.
Where it pays
There is no condition where it falls away badly, which is worth something over a season of mixed weather.
Above the line it delivers more than promised and gains on the fleet. Below, it falls short. Move the wind: plenty of boats sit on one side in the light and the other when it blows.
Full width is 0.4 kn either way.
At 10 knots this design makes back more than its rating asks on the downwind.
How fast is a Mat 12
Boat speed in knots, by true wind angle and wind strength.
| Angle | 6 kn | 10 kn | 14 kn | 20 kn |
|---|---|---|---|---|
| Beat VMG | 3.99 | 5.38 | 5.77 | 5.95 |
| 52° | 6.05 | 7.61 | 7.96 | 8.14 |
| 60° | 6.37 | 7.79 | 8.16 | 8.38 |
| 75° | 6.59 | 7.92 | 8.45 | 8.80 |
| 90° | 6.47 | 7.93 | 8.55 | 9.23 |
| 110° | 6.54 | 8.20 | 8.85 | 9.57 |
| 120° | 6.39 | 8.16 | 9.09 | 10.13 |
| 135° | 5.76 | 7.84 | 8.86 | 10.90 |
| 150° | 4.83 | 7.14 | 8.34 | 10.01 |
| Run VMG | 4.19 | 6.20 | 7.54 | 8.89 |
How they are set up
The range each sail spans across the fleet.
Nearly all carry a folding propeller. Crew weight is declared around 830 kg.
Rigging
Mat 12 rig and sail dimensions
A Mat 12 carries 16.49 m of mainsail hoist on a 5.77 m boom, a forestay 16.81 m above the deck. Typical figures across the 2 boats measured under the current VPP, with the range each one spans.
Rig
Sails