Honest answer: for most people learning to kitesurf in Ireland, the first kite is a 12m, and the second is a 9m. If you weigh around 75 to 85kg and ride a normal twintip, a 12m covers the 14 to 22 knot days that make up most of our sessions at Silverstrand, and a 9m takes over when the Atlantic gets going. Lighter riders slide one size down (10m and 7m or 8m), heavier riders one size up (14m and 10m). That is the short version. The rest of this post is about why, and how to adjust it for you.
What actually decides kite size
Four things: your weight, the wind, your board and your skill. Weight and wind do most of the work. A heavier rider needs more pull to get planing, and stronger wind gives more pull from the same kite. Board size nudges it: a bigger twintip (140cm plus) gets you going with less power, so you can hold a smaller kite. Skill matters more than beginners expect. Once you can edge properly and keep the kite moving, you will happily ride a size smaller than you needed in your first month.
If you like a formula, this one is close enough for a modern three-strut freeride kite: your weight in kg, divided by the wind in knots, multiplied by 2.2. An 80kg rider in 18 knots comes out at just under 10m. In 14 knots it is 12.5m. In 25 knots it is 7m. Do not treat it as gospel, but it will stop you buying something wildly wrong.
A rough sizing chart for Irish conditions
| Rider weight | 12 to 16 knots | 16 to 22 knots | 22 to 28 knots |
|---|---|---|---|
| 55 to 70kg | 10 to 12m | 8 to 9m | 6 to 7m |
| 70 to 85kg | 12 to 14m | 9 to 12m | 7 to 8m |
| 85 to 100kg | 14 to 16m | 10 to 12m | 8 to 9m |
These numbers assume a standard twintip and a kite with decent low-end, like the Ozone Catalyst V5 we teach on. A big-air kite with a tighter, more efficient profile often wants to be flown a size smaller than the chart says. If you are not sure what kind of wind you are looking at, our post on what wind speed you need to kitesurf walks through reading a forecast in knots.
What the wind does in Galway
This is where local knowledge earns its keep. From May to September, a lot of our sessions at Silverstrand and Rusheen Bay are sea-breeze days: south-westerly, 12 to 18 knots, steady and friendly. That is 12m territory for an average adult, and it is why we would never send a beginner home with a 9m as their only kite. They would sit on the beach all summer waiting for wind.
From October through to spring, the low-pressure systems roll in and 20 to 30 knots is normal. That is the 9m's job, and on the wilder days a 7m or 8m. Two kites, a 12m and a 9m, will cover roughly 80 percent of rideable days on the west coast. A third kite, either a 7m for winter storms or a 14m for the lightest summer evenings, is a luxury you can add once you know what you actually ride most.
Bigger is not safer
The mistake we see most often is buying too big "to be safe". A 14m kite on a gusty 22 knot day is not safe for a beginner. It is slow to turn, hard to relaunch and it keeps pulling long after you have let go of the bar. Kite size should be matched to the wind you will realistically ride, and when in doubt a beginner should be slightly underpowered, not overpowered. You will progress faster on a kite you can control than on one that is dragging you downwind.
The opposite mistake is buying a mate's old 8m because it was cheap. If you weigh 85kg and your first summer is sea breezes, an 8m is a very expensive wall decoration.
Kite design changes the numbers
Not every 12m is the same 12m. A single-strut light-wind kite like the Ozone Alpha V3 Ultra-X is lighter and pulls earlier, so an 80kg rider on foil or a big board might get away with a 10m where a heavier three-strut needs a 12m. A performance freeride kite like the Ozone Reflex sits somewhere in between: efficient, fast, and it likes being flown at the smaller end of your range. Every kite in our kites collection lists its size range, and we will happily tell you where each one really sits.
Learning first, buying second
Here is the thing nobody says loudly enough: the best way to know your kite size is to fly a few. On a lesson you will fly whatever the wind gives us that day, and after two or three sessions you will feel the difference between underpowered and overpowered in your own hands. That feeling is worth more than any chart. It is also why most of our students buy a kite after their lessons, not before, and why our beginner packages are built around the same kite sizes we teach on.
If you want to buy before you learn, or you are choosing a quiver for a spot other than Galway, send us your weight, your budget and where you will be riding and we will give you a straight answer. Sizing a kite is a five-minute conversation. Getting it wrong costs a lot more than five minutes.
Call in to the shop in Barna Village or book a lesson at Silverstrand, and we will get the size right before you spend a euro.
Read next: What kite should a beginner buy? · Kitesurfing in Ireland: the guide
