How big is a grain?

* A grain of wheat is typically around 6-8 millimeters (mm) in length and 2-3 mm in width.

* A grain of rice is typically around 5-7 mm in length and 2-3 mm in width.

* A grain of corn is typically around 8-10 mm in length and 4-5 mm in width.

* A grain of barley is typically around 8-10 mm in length and 3-4 mm in width.

Grains can also vary in size depending on the variety or cultivar. For example, there are some varieties of wheat that produce larger grains, and there are some varieties of rice that produce smaller grains.

In addition to the physical size of a grain, the weight or mass of a grain can also vary. For example, a single grain of wheat typically weighs around 30-40 milligrams (mg), while a single grain of rice typically weighs around 20-30 mg.

Here are some additional comparisons to give you an idea of the size of a grain:

* A grain of wheat is about the same size as a sesame seed.

* A grain of rice is about the same size as a pinhead.

* A grain of corn is about the same size as a pea.

* A grain of barley is about the same size as a lentil.

Grains are small, but they are packed with nutrients. They are a good source of carbohydrates, fiber, protein, vitamins, and minerals. Grains are an important part of a healthy diet.