30 grams of chia seeds is a serving size that measures 3.27 tablespoons. When poured into a loose pile, it is 3.07 in wide and 1.2 in tall, which is about the size of a golf ball.

In kitchen measures
3.27 tablespoons
9.82 tsp · 3.27 tbsp · 0.205 cups
about the size of a golf ball
Chia seeds typically ranges 0.55–0.68 g/mL depending on how it's packed. A firmly packed scoop weighs more.