D Ring Cuff Small 7 to 9 Omron Hydrocollator Moist Heat Cover 3 lbs *UPC: 714905014870 85180 3 lbs *UPC: 714905014870 Medium Upper Arm Circumference 10 15 * Protects against water penetration * Forms uniform watertight seal on the arm * Stretches easily over dressing or PICC Line dressing * Resists tearing * Returns to original size after each use * Measure circumference around upper arm Durable D ring contoured cuff fits arms 7 in circumference * To determine your arm size use a cloth measuring tape and measure the circumference of your left upper arm midway between your elbow and shoulder * The Small Cuff is compatible with Omron Blood Pressure Monitor models: BP710N BP742N and BP765