A 10 g serving of greens powder forms a pile 2.23 in (5.67 cm) wide and 0.936 in (2.38 cm) tall, weighing 0.353 oz (10 g). In comparison, a 30 g serving of whey protein powder creates a larger pile that is 3.33 in (8.47 cm) wide and 1.4 in (3.55 cm) tall, weighing 1.06 oz (30 g).

Biggest vs smallest
1.49× the size
30 g of whey protein powder vs 10 g of greens powder
Typical adult or standard sizes; real ones vary.