100 grams of duck breast is a standard portion size that weighs 3.53 oz (100 g). You can easily picture this amount as being about the size of a tennis ball.

In kitchen measures
7.12 tablespoons
21.4 tsp · 7.12 tbsp · 0.445 cups
about the size of a tennis ball
Density estimated by AI from typical values. Duck breast typically ranges 0.85–1.05 g/mL depending on how it's packed. A firmly packed scoop weighs more.