Sturdy leather cuff with a 5-4-5 pattern of small 77 studs. These cuffs have a soft leather lining. The straps are backed with leather, glued and stitched on to maintain their rigidity and break in nicely over time. I know these are a little more expensive, but the additional work that goes into these is well worth it, in my opinion.
This style of cuff takes a few days to break in, a little more so than others. The first time you put it on will feel a little awkward since the flat leather under the straps needs to conform to the shape of your wrist. I recommend wearing it with the buckles on the underside of your wrist and pointing away from you as you put it on (i.e. with your wrist facing up.
For sizing, measure around your wrist with a piece of string. You can go a little bigger for sizing, but not smaller.
For example, if your wrist is 6.5" around, you could wear a cuff for a 7" wrist, but not one that was sized at 6". In other words, a larger bracelet will fit with a little extra room but a smaller one will not.