The limb you put in your riser depends on what type of bow you have. You can put any bow limb in your riser if you have a recurve bow and longbow. However, you must be careful about which limbs you attach to your riser if you have a compound bow. Compound bows have a lot of technology built into them, making them more accurate than other types of bows. This technology includes using cams and pulleys designed to work together to create a smooth and consistent draw. If you put limbs designed for a recurve bow or longbow in a compound bow riser, you will not get the same benefit from the technology built into the compound bow. It is because the cams and pulleys would not work together, leading to a decrease in accuracy. Sizes of Riser The Target riser is usually 25 inches. The length can be from 22-27 inches. You can put a limb with 58 inches in this riser. The Olympic recurve riser is usually 25 inches. The length can be from 22-27 inches. So, the size of your limb will be 66 inches in this riser. The hunting/field riser is usually 24 or 26 inches. The length can be from 20-28 inches. Your limb is 54 or 62 inches in length in this riser. The take-down riser is usually 24 or 26 inches. The length can be from 20-28 inches. And your limb is 54 or 62 inches. You can put any limb in any riser, as long as it is the right size for the riser. And remember, if you have a compound bow, be careful about which limbs you put in your riser to get the most benefit from the technology built into your compound bow.