We have all been told that to lose weight we must practice proper portion control, but how many of us know what a proper portion size actually looks like? The following visual cues are easy to remember and can help you practice proper portion control. 3 ounces of meat is about the size of your palm or a deck of cards. 1 cup is about the size of a baseball. 1 tablespoon or ounce is about the size of your thumb. 1 teaspoon is about the size of your thumb tip. 1 tennis ball is about the size of 3/4 cup of veggies or fruit. 1 handful of snacks is equivalent to 1-2 ounces. 1/4 cup is about the size of one egg. 2 teaspoons are about the size of a ping pong ball. 1/2 cup is about the size of a computer mouse.