Sizing: Size smaller matches wrists sized 135mm to 150mm, size medium fits wrists sized 145mm to 165mm, and size large suits wrists sized 160mm to 180mm. You can certainly connect and remove the bands with the short-release pin. Regretably, the stainless steel link band doesn't have that progressive link release https://wrist-brace20517.59bloggers.com/27202036/removing-links-from-citizen-watch-band-no-further-a-mystery