How to Choose a Blood Pressure Monitor with Extra Large Cuff

Measure your mid-upper arm first, then pick a monitor whose cuff range fully covers that measurement — fit controls reading accuracy.

For the full breakdown, see our best Blood Pressure Monitor With Extra Large Cuff guide.

The fastest way to buy the wrong monitor is to shop by the word “XL.” You can learn how to choose a blood pressure monitor with extra large cuff correctly in about two minutes, because the whole decision comes down to one measurement: the circumference of your mid-upper arm.

Measure Your Upper Arm Before You Buy

The cuff size you need is the size whose labeled range covers your arm, so measuring comes first. Let your arm hang relaxed at your side and wrap a cloth measuring tape around the midpoint of your upper arm, halfway between shoulder and elbow. Write down the number in centimeters and inches; that figure is what you compare against every cuff’s labeled range.

Fit, not the device, is a major source of wrong readings on home monitors. General cuff-fitting guidance holds that the cuff bladder should be about 80% of your arm’s circumference in length and at least 40% in width — a short or narrow bladder can skew readings even when the cuff looks fine.

One more habit improves accuracy: at your first reading, take blood pressure in both arms and use the arm with the higher reading for all later measurements.

Extra Large Cuff Sizes: What the Label Actually Means

“Extra large” is not one standard size. Clinical cuff-sizing guidance divides adult arms into four bands, with the extra-large band running from 45 to 52 cm (17.7 to 20.5 in). Omron’s US site lists its home cuffs as small adult (7–9 in), standard adult (9–13 in), and large adult (13–17 in), and notes that cuff size is based on upper-arm circumference, or wrist circumference for wrist monitors.

Notice the gap in the last row: the clinical extra-large band runs to 52 cm, while Omron’s extra-large home cuff covers 42–50 cm.