A quality SUP fin is required for every stand up paddle board. The fin is crucial for tracking and stability. Without it, you’ll be quite literally going in circles. Green Water Sports has high-quality SUP replacement fins and fin hardware for inflatable paddle boards. Stand-up paddle board fins come in all shapes and sizes tailored to conditions, boards, and paddling disciplines. Our paddle board fins range from 4.6″ to 9″ in size, and we have specialty SUP fins for use in race, river, touring, surf, and whitewater conditions. Come see what we available today and find a paddle board fin that suits your board and the way you paddle.