10 grams of pre-workout powder is a common serving size that occupies a volume of 1.23 tbsp (18.2 mL). When poured into a loose pile, it is about the size of a cherry tomato, measuring 2.16 in (5.49 cm) wide and 0.907 in (2.3 cm) tall.

In kitchen measures
1.23 tablespoons
3.69 tsp · 1.23 tbsp · 0.077 cups
about the size of a cherry tomato
Pre-workout powder typically ranges 0.45–0.65 g/mL depending on how it's packed. A firmly packed scoop weighs more.