When you're out trout fishing, the size of your hook can make a big difference in your success. Generally, for most trout fishing situations, you'll want to stick with hooks in the range of size 8 to size 14. Smaller hooks, like size 12 or 14, work well for finesse techniques or when using live bait like worms, while slightly larger hooks, like size 8 or 10, are great for lures and flies. Keep in mind that the type of water you're fishing and the bait you're using can also influence your hook size choice. In smaller streams or when targeting stocked trout, smaller hooks can be more effective, while in larger bodies of water, you might find that a slightly bigger hook helps with better hook sets. Always have a variety of sizes in your tackle box to adapt to different conditions and trout feeding habits.