Follow these steps

1. Sit down, if possible, to work at eye level. Infants and young children can sit in the assistant’s lap.
2. Remove any clothing that covers the child’s left arm.
3. Find the mid-point of the child’s upper arm by doing the following steps:
   1. Locate the tip of the child’s shoulder with your fingertips.
   2. Bend the child’s elbow so the arm makes a right angle.
   3. Estimate where the middle of the upper arm is (the upper arm is the section between the shoulder tip and the elbow). (See Image 1.)
   4. Mark this as the mid-point. (See Image 2.)
4. Straighten the child’s arm.
5. Wrap the tape around the child’s arm at the mid-point mark you have just made.
6. Make sure that the tape is:
   • against the skin and not over any clothing
   • horizontal around the child’s arm
   • not too tight (the band is too tight if the skin bunches up), and
   • not too loose (the band is too loose if you can fit a pencil under it).
7. Read the measurement and record it to the nearest 0.1 cm (e.g. 14.2 cm). (See Image 3.)