I wouldn't get one smaller than a 6' radius (12' diameter). 3/8 mesh is great for shad, although very small shad will get gilled. A cheap net is harder to use because of stiffness, but until you learn how and where to use them, the price is right. Once you have some experience, move to an 8' or even a 10' net to cover a MUCH bigger area and a high quality net is worth every penny ($150-200). Just expect to occasionally tear one up or even lose one on the bottom rocks or stumps.