[Adjustable large bracelet] The ALE professional blood pressure bracelet varies from 22 cm to 42 cm (8.7 inches at 16.5 inches). The arm tensiometer bracelet is suitable for most adult arms. The strong velcro around the cuffs fixed around the arm, and the high quality dustproof material makes the surface comfortable and easy to clean. You can compare it with other sleeve pressure measuring devices. Approved by CE / NHS / ISO: The AILE blood pressure monitor for the upper arm has passed a specific algorithm and a chip certification.