ELEVATE PRO Replacement Blade (Qty 1) You must select one of 3 sizes for WIDTH and THICKNESS.
John Dudley's recommendations on Blades Width are FREAK for Micro diameter Arrow, STANDARD for standard diameter arrows up to 22 dia. & the WIDE blade for arrows larger than a 23 wall diameter.
Blade THICKNESS depends on angle you set your blade and weight of your arrow. Heavier arrows will need a heavier blade. .010 is the most common but lighter arrows will tune better with a .080 and heavier arrows may prefer up to a .012.