You would typically use grams (g) to measure the mass of a raisin.

Here's why:

* Raisins are small: Grams are a convenient unit for measuring lightweight objects like raisins.

* Standard unit: Grams are the standard unit for measuring mass in the metric system, which is widely used worldwide.

While you could technically use other units like milligrams or kilograms, grams are the most practical and common choice for a raisin's mass.