In the beginning you will be recommended a small sail, so that you do not sail too fast, the sail is lighter and it is easier to use.
Later, depending on your height, you will use a larger one. Your windsurf camp or surf school offers you a selection of several sailing sizes, so that you are prepared for all wind events.
The windsurfing sail supports you and helps you with steering and it has the advantage that you do not fall off the board all the time, especially at the beginning. For this you will also be advised optimally in your windsurf camp or surf school.
Furthermore, it is very important that you protect your body from wind, water, cold and warmth at all seasons. There are wetsuits in a lot of thicknesses and designs. The right advice in your windsurfing course or a windsurfing shop is the right way!