The sizing is the same as with OTP (for size S X-long, color Black), the leg circumference is also the same as in OTP (according to some reviews, the leg is very narrow in this model), thin, light, flexible material, good for warmer days, but something went wrong in production when it comes to proper size labeling. In the photo, it's the same model, same size, different color, and the leg in Shadow grey is a few cm shorter... so if something doesn't seem right with the size, maybe it's not because the manufacturer changed the sizing, but because the small Chinese hands labeled the product incorrectly.