Thank you for your question about our Gazelle Runner Arm Sleeves! These have quite a bit of stretch to them, but the measurements given above are for the sleeves unstretched, laying flat. To choose a size, measure your upper arm where you would like the top of the sleeve to sit, halve that number, and compare it to the widths given. Then measure from your wrist to your upper arm and compare that to the lengths listed. Choose the size that most closely corresponds. If you are still undecided, please call our Customer Service Team at (866) 329-5603 and they would be happy to try to help.
Date published: 2019-10-07