25 grams of psyllium husk powder is a light, fluffy substance that occupies a surprising amount of space. Poured into a loose pile, it is 3.39 in (8.6 cm) wide and 1.69 in (4.3 cm) tall, which is about the size of a large egg.

In kitchen measures
5.64 tablespoons
16.9 tsp · 5.64 tbsp · 0.352 cups
about the size of a large egg
Psyllium husk powder typically ranges 0.25–0.4 g/mL depending on how it's packed. A firmly packed scoop weighs more.