With the multitude of different shapes now available for all surfers, choosing the right surfboard can be a daunting task. The Watermark Surfboards App, powered by Board Formula’s proprietary algorithm, generates your optimum range of volume based on your height, weight, fitness level and surfing ability. The app then presents all of the Watermark models that fit your optimum volume range, allowing you to consider various surfboard shapes and dimensions using volume as the common denominator.