The correct cuff fit is essential for accurate blood pressure measurement - always ensure that you are using the most suitable cuff size to fit your arm. The Omron Blood Pressure Monitor Cuff is a replacement cuff that fits current Omron Blood Pressure Monitors (except 907, M7, M6 Comfort, M10-IT and i-C10). This medium Omron cuff is suitable for arm circumferences of 22-32cm.