1.) Select Your Cast Type Full Arm Full Leg Half Arm Half Leg 2.) Measure Arm / Leg Circumference 2” Inches above the Cast Enter Measurement Inches (ex. 8 or 7.75) 3.) Measure Length to End of Finger or Toes Enter Measurement Inches (ex. 16 or 15.5) Based on Your Measurements We Recommend : Still Have Questions? Call Us at 1-888-337-9776 Size Charts Full Arm Cast Covers Arm Cast Cover Model # Arm Circumference Length X-Small Full Arm FA-12 6 – 6.75 inches 16 inches Small Full Arm FA-14 6.75 – 8.75 inches 23 inches Medium Full Arm FA-16 8.75 – 10 inches 28 inches Large Full Arm FA-18 10 inches & up 31.5 inches Half Arm Cast Covers Small Half Arm HA-13 7.75 – 10 inches 17.5 inches Large Half Arm HA-15 10 inches & up 20 inches Leg Cast Covers Leg Cast Cover Model # Leg Circumference Length X-Small Full Leg FL-12 7.5 – 11 inches 19 inches Small Full Leg FL-14 14 – 16.5 inches 29 inches Medium Full Leg FL-16 16.5 – 21 inches 33 inches Large Full Leg FL-18 21 inches & up 37 inches Half Leg Cast Covers Small Half Leg HL-13 10 – 13 inches 21 inches Large Half Leg HL-15 13 inches & up 23.5 inches More on How to Measure Measuring Circumference Measure the circumference of the arm or leg right above the cast. If the end of the if the cast is very close to the elbow, then measure mid-bicep (for arm) or measure mid-thigh (for leg). Do not measure around the cast ! Only measure around the skin of the arm or leg above the cast. Measuring Length Measure from the tip of the middle finger (or the bottom of the heel) to the top end of the cast. It is OK if the cast protector measurement is longer then the limb measurement. The protector will still work. Extra length will be removed when the vacuum seal is created.