[dragonwriter]

> Standard spoons for cooking are are much bigger than regular table spoons, and their volumes are clearly marked

No, measuring teaspoons and tablespoons aren't usually much larger than tea/tablespoons for use at the table.

They typically have shorter but wider handles and different shapes (often semispherical, but there are others).

[kijin]

Depends on what you use at your table. My tablespoons only seem to hold 10ml, and what passes for a teaspoon in my country is less than half the size of a measuring teaspoon. This kind of inconsistency is exactly why measuring spoons have been standardized.