0.5 cups of sunflower seeds is a portion that weighs 2.42 oz (68.6 g). In plain terms, this amount 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. Sunflower seeds typically ranges 0.5–0.65 g/mL depending on how it's packed. A firmly packed scoop weighs more.