Step 5Measure Elastic and Assemble
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Next, measure a piece of elastic around your chosen appendage. If it is your leg, decide where you want the pump to fall, and measure a piece of elastic that will be snug (not too tight) and have an extra 2 cm or so on each side to be sewn into the garter. You can always trim the extra edge on the inside off at the end, but it is not easy to adjust the tightness of the elastic once you've sewn it. Therefore, take some time to feel it out before you cut and sew it.
Next, you will turn the case and lining inside out, and fold it up around your actual pump to make sure you have the correct size. Once you've got that lined up, take the pump or device out, and put your piece of elastic inside.