The Omron blood pressure cuff alignment is an important component of measurement accuracy, so if your cuff is misaligned, it can contribute to inaccurate results. The expanded coverage Omron easy-wrap ComFit cuff inflates around the entire circumference of your arm to help ensure that the brachial artery is compressed for a comfortable, accurate reading. Pre-formed for easy application, This Wide-Range cuff fits both standard- and large-sized arms, 9 in. To 17 in. In circumference. When purchasing a home blood pressure Monitor, it's important to know your appropriate cuff Size. To determine your proper cuff Size, Use a cloth measuring tape and measure the circumference of your left upper arm, midway between your elbow and shoulder. Ensure that the blood pressure cuff is neither too tight nor too loose to help ensure the most Accurate readings and provide you a more accurate picture of your heart's health. This cuff is only compatible with the following Omron blood pressure Monitor models: BP5250, BP7350, and BP7450.