100 grams of cooked chicken breast is 3.53 oz (100 g). It is about the size of a tennis ball.

In kitchen measures
11.3 tablespoons
33.8 tsp · 11.3 tbsp · 0.704 cups
about the size of a tennis ball
Density estimated by AI from typical values. Cooked chicken breast typically ranges 0.5–0.7 g/mL depending on how it's packed. A firmly packed scoop weighs more.