I have the exact same problem for all my Hermes chaine d'ancre bracelets. The only trick I can give is to put it on your non-dominant arm, as it tends to be the smallest. On the other hand, you become better at taking it off and on over time. I had a very similar experience than you a few months ago when I trying on other chaine d'ancre bracelets, and I was unable to put my Giant Alea bracelet back on, thankfully my SA gave me a dustbag to put it in. Have you tried on other chaine d;ancre bracelets, they might be a better fit for your wrist. I hope that helped.After purchasing many hermes bracelets I decided to try the chaine d'ancre in the large size. I ADORE this bracelet, love it to pieces - goes great with cdc, clics, charnieres....everything in my drawers. HOWEVER, I find it impossible to get the bracelet on and off. I literally was sweating in the boutique yesterday!! (not a pretty sight) I have a small wrist and the bracelet I was trying on was perfect , that is when I got it on...Problem is that I would never be able to take it off!!! I tried to size up but it was waaayyyy too large. Does anyone have any tricks as to this fabulous piece? or is this just not for me??