How are bikes measured and what factors should be considered when determining the correct size for a rider?

Bikes are typically measured by the size of the frame, which is usually expressed in inches or centimeters. When determining the correct size for a rider, factors such as the rider's height, inseam length, and riding style should be considered. It is important to ensure that the rider can comfortably reach the handlebars and pedals while maintaining proper posture for a safe and enjoyable riding experience.