It can be tricky to judge which size to choose when moving on to new kit. Board sizes are indicated in volume, fin sizes in cm (depth) and sail sizes in m². But is that correct? Not really and it’s not consistent either. Volumes and surfaces are hard to measure for correctness and we´ve seen quite a bit of variation between brands over the years, even if nowadays CAD programs will give the designer the correct figure. Rocker lines or foil depths are hardly ever given but at least can be measured. Widths, depths or luff lengths are nearly always given and can be measured easily for which they are usually pretty correct.

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