Blood pressure monitors are designed for certain ages and cases. You can find monitors for older adults, for pregnant women, and for children. Make sure the one you choose is the right one for your age and situation. The American Heart Association recommends an automatic cuff monitor that fits on your upper arm (bicep). The cuff should fit your arm size. A cuff that’s too large or too small will not give an accurate reading. Measure around your upper arm to find your size. Monitors that attach to your finger or wrist are not as accurate as monitors for your upper arm. Ask your healthcare provider for help in choosing a monitor. Bring your monitor to your next provider visit if you need help in using it the correct way. The steps below are general instructions for using an automatic digital monitor.