Suckers are a great bait for catching bigger fish. Suckers get very big. Bait shops will sell them in a variety of sizes from 3 or 4 inches up to 12 inches and even bigger at some places. Suckers in the 5 to 8 inch range work well for big largemouth bass. For catching northern pike and muskie, you can go even larger. Suckers are very hardy. They will last long in the bait bucket and on the hook. If you are keeping a half dozen or more in a bait bucket, you should consider using an aerator because there is only so much oxygen in an average-sized bait bucket. With the proper aeration, they will last days and possibly even weeks.