This bangle started life as 3mm round wire. I had to taper the ends to make them thin enough to wrap around each side. Due to the hammering, the main body of the bangle has a square profile. It is marginally adjustable and can be opened a little bit to ease putting it on. When it's on, it can be squeezed a little bit smaller. This is a small bangle (6cm - 6.25cm diameter), but I have just about enough wire to make a bigger one if you would like! It is for sale in my Boticca shop.