60 grams of rolled oats is a serving that measures 2.12 oz (60 g) by weight and 10.1 tbsp (150 mL) by volume. When poured into a loose pile, it is about the size of a tennis ball, measuring 4.27 in (10.8 cm) wide and 1.92 in (4.88 cm) tall.

In kitchen measures
10.1 tablespoons
30.4 tsp · 10.1 tbsp · 0.634 cups
about the size of a tennis ball
Rolled oats typically ranges 0.38–0.48 g/mL depending on how it's packed. A firmly packed scoop weighs more.