Selecting the proper prize sizes for your toy crane machine is crucial for both profitability and customer satisfaction. The ideal prize should be large enough to attract players but small enough for the claw to grip effectively. Start by measuring your machine's prize drop area and claw opening width - prizes should generally be 1-2 inches smaller than these measurements. Consider your claw's strength; heavier prizes require stronger claws. Mix different sizes, with about 60% medium-sized items (4-6 inches) that are easiest to win, 25% smaller premium items, and 15% larger "grand prize" items. Popular choices include 5-inch plush toys, 3-inch blind box items, and 7-inch premium characters. Test different configurations and observe what players can successfully retrieve, adjusting your mix based on performance data. Remember that visible, colorful prizes placed near the chute increase play frequency. Regularly rotate your prize selection to maintain customer interest and prevent regular players from memorizing winning techniques for specific items.