How long is 18 inches?

The inside diameter of a standard NBA and NCAA basketball rim is exactly 18 inches.

A regulation bristle dartboard used in professional tournaments measures exactly 18 inches (45.72 cm) in diameter.

The classic metal wire hanger provided by most dry cleaners is manufactured to be exactly 18 inches wide straight across the bottom bar.

While fast-food chains vary, an authentic, traditional "Large" pie at standard New York-style pizzerias is baked to an 18-inch diameter.

This ancient unit of measurement, originally based on the distance from a person's elbow to the tip of their middle finger, was later standardized in English custom to exactly 18 inches.

The most common standard necklace chain length, designed to rest gracefully just below the collarbone, is exactly 18 inches.

While highway cones are generally 28 inches tall, the standard medium-sized cones used in parking lots, schools, and driver's education courses are 18 inches high.

Standard compact physical therapy foam rollers, designed for travel or targeting specific isolated muscle groups, are cut to 18 inches in length.

One of the most standard and widely used sizes for a drum kit's crash cymbal is exactly 18 inches in diameter.

A classic American wooden baker's rolling pin, measured entirely from the outer tip of one handle to the tip of the other, is traditionally 18 inches long.