A really late update, i bought a pale green jade bangle online in august and two weeks later, i decided that it is a little too big for me at 56mm and bangs around so much at my desk job, hence, placed another order for a white, greyish jade bangle at 51 mm.
The 51mm fitted really well and i had to really squeeze my hand in to fit. However, i feel that i can really go even smaller like 49 mm for a better fit. Well, i will wait till i go to the jade markets in Hong Kong and buy in person. Buying online is truly a leap of faith

I have been wearing it 24/7 non stop for 2 weeks.
Now, i don't know what to do with 2 bangles as i can't wear them as a stack as they are too noisy. Perhaps i should give the larger green one to my mommy.
excuse my dry winter hand