15 grams of cocoa nibs is a small serving that measures 0.529 oz (15 g). It has a volume of 1.84 tbsp (27.3 mL) and is about the size of a ping-pong ball.

In kitchen measures
1.84 tablespoons
5.53 tsp · 1.84 tbsp · 0.115 cups
about the size of a ping-pong ball
Density estimated by AI from typical values. Cocoa nibs typically ranges 0.45–0.65 g/mL depending on how it's packed. A firmly packed scoop weighs more.