One cup of cornstarch is a fine, powdery ingredient used in cooking and baking. It is about the size of a coffee mug.

In kitchen measures
16 tablespoons
48 tsp · 16 tbsp · 1 cups
about the size of a coffee mug
Cornstarch typically ranges 0.47–0.55 g/mL depending on how it's packed. A firmly packed scoop weighs more.