0.5 cups of chocolate chips is a common measurement for baking. It is about the size of a tennis ball.

In kitchen measures
8 tablespoons
24 tsp · 8 tbsp · 0.5 cups
about the size of a tennis ball
Density estimated by AI from typical values. Chocolate chips typically ranges 0.65–0.8 g/mL depending on how it's packed. A firmly packed scoop weighs more.