The measurements listed are for the unstretched adult nylon/spandex
(the original) Moeben Sleeve. Because of the fabric content,
Moeben Fleece and Moeben Bamboo and Moeben Hemp will
be a small fraction larger, but usually the same size for all
four different fabrics should fit. Typically your Moeben Sleeve
size will be the same as a men's shirt size. If you're a medium men's
shirt, a medium Moeben should fit, unless you've got some pretty
beefy biceps, the next size up might be best. The Moeben Sleeves
are made a little longer to help protect your hands from the
sun's harmful rays. And, the extra length of your Moeben
Sleeves can keep your hands warm on a cold day.
If you're measuring your upper arm, it will be about 1-2 inches larger
than the desired sleeve.