There isn't a single, defined width for the moon. The moon is a spherical body, and its width can vary depending on the point of reference.

The diameter of the moon is about 3,474 kilometers (2,159 miles). This is the distance across the moon's center at its widest point.

The moon's equatorial radius is about 1,737 kilometers (1,080 miles). This is the distance from the moon's center to its surface at the equator.

The moon's polar radius is about 1,736 kilometers (1,078 miles). This is the distance from the moon's center to its surface at the poles.