Things You'll Need
Instructions
Measure the bicep area of the arm with a measuring tape.
Cut 3-inch-wide black fabric so it is the length of your arm measurement plus half again.
Fold the right sides together lengthwise and stitch a seam, with a 1/4-inch-wide seam allowance. Use a sewing machine or hand stitch this seam.
Turn this tube inside out so the seam is on the inside.
Cut a piece of 1/2-inch elastic to the bicep measurement.
Attach a safety pin to the end of the elastic.
Feed the elastic into the black tube, using the pin as a guide.
Sew the ends of the elastic together.
Use hand stitching to attach the two ends of the black tube together, totally encasing the elastic .