The main category of the board shorts split into men, women, and children. The difference between this is especially in sizes and patterns.
Make sure when choosing your board short they should fit properly because this will bring less resistance when you are in the water or on your board. They should be loose enough to be comfortable but not so loose that they will come out of the water. You can also buy board shorts for men via coegawear.
Another big difference between shorts is the price. It can be difficult finding the right shorts for the right price. Shorts are less available but tend to be of the best quality or material which in turn would not be good for surfing or other water activities.
Best quality board shorts are usually well-known brand names. It's more expensive but well worth the extra cost.
Differences in various brands of board shorts:
Different brands are available today with large board shorts and it is sometimes difficult to know which brands are better than others. All major brand shorts are similar in that they are all worth the money and be comfortable to wear and surf.
They do however have a little difference between them, such as Billabong is known for its triple-stitching to make them more durable.