To choose your surfboard size, start with your weight, skill level and the type of board you are looking for. Then compare the length, width, thickness and volume of the selected size. Your height in centimetres provides context, but it cannot determine the right surfboard length on its own.
A 7'6 can be an accessible board for progressing or a model that is still too demanding for your learning stage. A shorter board can also have more volume than a long, thin board. Here is how to read the dimensions and compare sizes without relying solely on the length in feet.
How do you read surfboard dimensions?
Dimensions are generally given in feet and inches. A marking such as 7'6 × 21 1/2” × 2 7/8” indicates, in that order, the length, maximum width and maximum thickness.
A length of 7'6 means 7 feet and 6 inches, not 7.6 feet. One foot equals 30.48 cm and one inch equals 2.54 cm. Here, the length is 228.6 cm.
What are common sizes in centimetres?
| Listed length | Length in cm, rounded to the nearest whole number |
|---|---|
| 5'6 | 168 cm |
| 6'0 | 183 cm |
| 6'6 | 198 cm |
| 6'8 | 203 cm |
| 7'0 | 213 cm |
| 7'2 | 218 cm |
| 7'6 | 229 cm |
| 8'0 | 244 cm |
| 8'6 | 259 cm |
| 9'0 | 274 cm |
This table converts units. It does not recommend a length based on skill level or weight.
What is the difference between length, width, thickness and volume?
Length helps the board glide when paddling and affects how bulky it is and how it handles turns. Width and its distribution contribute to the supporting surface area. Thickness affects volume and rail shape. Volume, expressed in litres, provides a reference point for buoyancy.
These characteristics need to be considered together: a thick board with a narrow nose and a short supporting surface does not behave like a long, wide board with the same volume. The rocker, which is the curve of the board viewed from the side, also affects how it glides.
Should you choose based on your height or your weight?
Weight is an important reference point for checking that a board offers enough buoyancy. A surfer's height, build and mobility affect their comfort and balance, but do not provide a universal formula.
Two people who are 1.80 m tall can weigh 65 and 90 kg. Two surfers weighing 80 kg can also have very different needs if one is learning to pop up and the other surfs several times a week.
Which board should you choose if you are 1.70 m or 1.80 m tall?
Do not automatically choose a 6'0 because it measures around 1.83 m. A length close to your height may suit certain shortboard uses, but it remains a poor general rule for learning.
The useful question is: “What dimensions will let me paddle, catch waves and work on my lines at my current level?” Then check that answer against the model's intended use.
What size surfboard should you choose at 60, 70, 80 or 90 kg?
Weight alone is not enough to recommend a length in feet. For any body size, start with a board type suited to your surfing, then look at the available dimensions and volume.
| Situation | What to compare first |
|---|---|
| 60 to 70 kg and first sessions | How forgiving the beginner model is, its stability and volume; low body weight alone does not justify a short board |
| 80 kg and learning | Sufficient length, width and volume together; the label “7'6” alone does not guarantee ease of use |
| 90 kg or more | Recommended weight range, generous dimensions and volume of the selected size; avoid compensating with thickness alone |
| Independent surfer, regardless of weight | Comparison with your current board, desired riding style and manufacturer's recommendations |
The weight range on a manufacturer's spec sheet should be considered alongside the board's intended use and recommended skill level. It does not promise that a model will be equally easy to ride for everyone within that range.
How do you match board dimensions to your skill level?
The ease of use you need changes as your surfing develops. Your ability to catch waves consistently is a better indicator than the number of years since your first session.
For your first sessions: keep a large, stable platform
A long, wide beginner board with enough volume generally makes paddling and balancing easier. Length helps you glide smoothly; width provides stability when standing up.
Compare beginner softboards by their intended use and exact dimensions. A small foam board is still short: its soft covering does not make it as easy to ride as a large surf school board.
If you're choosing your very first surfboard, our guide to choosing a beginner surfboard builds on these guidelines with advice on choosing construction and equipment.
For improving surfers: keep the features that make catching waves easier
If you're already catching unbroken waves and holding a line, you may want more control through turns. That doesn't necessarily mean going much shorter.
A board designed for progression may feature a different outline, rails or tail while maintaining good paddling glide. Funboards and mini-mals let you compare this kind of balance.
Already catching waves on your own? Our guide to surfboards for intermediate surfers helps you choose the shape before fine-tuning its dimensions.
For occasional surfers: leave yourself some extra comfort
A few sessions a year leave less time to maintain paddling endurance and make your take-off second nature. A demanding board may work well during a good session, then become frustrating when you're tired or the waves lack power.
Between two suitable sizes of the same model, look at what the more generously sized option actually offers: extra length, width, volume and intended use. The larger one isn't automatically better, but it's worth comparing if ease of use is your priority.
Does the right length change depending on the board type?
Yes. Dimensions only make sense in relation to a board's intended use. Going shorter when switching from a funboard to a fish is not the same as choosing the next size down in the same model.
Fish and shortboard: don't copy the length from another board category
Some fish boards are short and wide, with volume distributed to promote glide in the conditions the model is designed for. Their shorter length may require solid positioning and balance skills.
Among shortboards, differences in width, rocker and volume matter. A 6'0 designed for small waves and a performance 6'0 are not interchangeable.
Longboard: choose according to your riding style too
A longboard's length should be chosen alongside its width, weight, rocker and intended use. A model designed for walking the board and noseriding aims for a different feel than a more manoeuvre-focused longboard.
Compare longboards based on the style you want to ride. Their length doesn't necessarily make them easy boards to surf in all waves.
If you're still unsure which board type to choose, our guide to choosing a surfboard helps you narrow down your intended use before selecting the dimensions.
Is one 7'6 equivalent to every other 7'6?
No. Take two versions of the Torq Mod Fun: the manufacturer lists the following dimensions.
| Version | Length | Width | Thickness | Volume |
|---|---|---|---|---|
| Mod Fun TET | 7'6 | 21 1/2” | 2 7/8” | 52.4 L |
| Mod Fun Soft Deck | 7'6 | 21 7/8” | 3 1/8” | 58 L |
At the same length, width, thickness and volume differ. Construction varies too. Choosing “a 7'6” without specifying the version doesn't describe the board you're looking for precisely enough.
These specifications are an example of how to compare boards, not an automatic recommendation for a given weight. References: Torq Mod Fun TET and Torq Mod Fun Soft Deck.
How do you choose between two sizes of the same model?
Start by checking what actually changes. Within a range, moving up a size doesn't always just add length: width and thickness can change too.
For the Torq Mod Fun TET, for example, the 7'2 is listed at 47.2 L, compared with 52.4 L for the 7'6. The width increases from 21 1/4” to 21 1/2”, and the thickness from 2 3/4” to 2 7/8”. So the choice involves several dimensions at once.
Ask yourself three questions:
- What's holding me back right now? If you're missing takeoffs or quickly running out of energy while paddling, check how user-friendly the board is before going shorter.
- What waves will I use the board in? Glide and buoyancy can help in weak conditions; faster waves also call for a shape that provides the right control.
- Have I tried a comparable board? Firsthand experience is valuable when making sense of the numbers.
HawaiiSurf's tip
Note the dimensions of the board you feel comfortable on, then adjust the specifications with a clear goal in mind. Going much shorter, reducing volume and switching to a narrower shape all at once can make it hard to understand how each change affects your surfing. Compare what each model brings to your current surfing.
What signs might indicate a board is too small?
Struggling to paddle, catching few waves and having trouble balancing may suggest the board isn't forgiving enough. But these signs can also come down to positioning, technique, fatigue or conditions. Try a more forgiving board in comparable waves and get some advice before blaming length alone.
Can a board be too big?
Yes, depending on your intended use or constraints: difficulty carrying, storing or transporting it, bulkiness through turns, or handling that doesn't suit your preferred style. A larger board is still a good choice when it suits your surfing. The ideal size is a balance, not a race to the shortest surfboard.
What should you check before buying your chosen size?
Check the dimensions and volume of the exact variant, the manufacturer's intended use and the fins required. Also make sure you can transport and store the board properly.
For protection, compare surfboard bags, checking both the length and width they accommodate. Two boards of the same length may need differently shaped bags.
Once you've settled on the dimensions, surf packages give you −10% when you buy a board and a set of fins at HawaiiSurf. Check the fin box system and recommended setup to put together a compatible package.
Action sports specialists since 1976, HawaiiSurf helps you make the right choice. Compare surfboard dimensions based on your build, experience and typical sessions.
