The Athletic Works practice foam training baseballs are perfect for short toss practice and other fielding drills for baseball or softball. The Practice foam baseballs are a soft yellow foam material so they can be used both indoors and outdoors. Practice foam balls are great for warming up pre-game or staying ready during inning changes. Warming up is essential, the balls are especially beneficial in space restricting areas, provide instant feedback. These practice foam baseballs each weigh 1.5 oz and have a 9 in. circumference.