One tablespoon of butter weighs 0.475 oz (13.5 g) and has a volume of 1 tbsp (14.8 mL). It is about the size of a grape and fills a glass 1.03 in (2.61 cm) wide.

In kitchen measures
3 teaspoons
3 tsp · 1 tbsp · 0.063 cups
about the size of a grape
Butter typically ranges 0.9–0.92 g/mL depending on how it's packed. A firmly packed scoop weighs more.