What is Cuff size and upper-arm design?
A BP monitor is only accurate if the cuff fits your upper arm and sits at heart level.
Short answer
One-size cuffs that claim to fit all arms — measure your mid-arm circumference first.
Cuff size and upper-arm design when buying a home medical devices
A BP monitor is only accurate if the cuff fits your upper arm and sits at heart level.
Why it matters: Wrist monitors are convenient but readings vary wildly with arm position.
Look for: One-size cuffs that claim to fit all arms — measure your mid-arm circumference first.
Full Home Medical Devices buying guide