Abstract: A wearable fitness band system for measuring a body part change in dimension utilizes a wearable fitness band device comprising strap assembly that is configured for being wrapped around the circumference of a body part to be measured. The strap assembly has a sensor that senses a change in dimension of the strap assembly while the strap assembly is wrapped around the body part and provides a sensor output. A processing unit coupled to the sensor receives the sensor output and provides a measurement output. A display that receives the measurement output and provides a measurement output reading correlating to the measurement output.

Abstract: Wearable fitness band that measures the circumference of arms, legs, and other body parts is disclosed. This invention is a wearable product that can be used during an exercising session. This product can expand and contract as the users muscles expand and contract, while actively measuring circumference.