Insider tip: they said "bracelet" refers more to the flexible chain type, and "bangle" is the hard type. I'm only talking about the hard types here, using both "bracelet" and "bangle".
There are 3 thicknesses. The 2 thinner ones flex. The thickest one has a hinge.
Narrow (thinnest one), small, white gold: SGD1850
Medium, small, white gold: SGD2500
The flexible one with diamonds (I think there may be another one with hinge and diamonds): SGD5000
There's a sterling silver one that isn't available in Singapore.
Sterling silver single infinity bangle: SGD655
Sterling silver double infinity bangle: SGD815