10 grams of instant yeast is a small amount that takes up 1.23 tbsp (18.2 mL) of space. When poured into a loose pile, it is about the size of a cherry tomato.

In kitchen measures
1.23 tablespoons
3.69 tsp · 1.23 tbsp · 0.077 cups
about the size of a cherry tomato
Instant yeast typically ranges 0.5–0.62 g/mL depending on how it's packed. A firmly packed scoop weighs more.