A beautiful statement piece.  The cuff is stainless steel with a high polish exterior and a brushed steel finish on the interior.  The bearing is part of the Ford GT Gearbox and is called a 'Radial Needle Bearing'.  The cuff is slightly ajustable by carefully bending the steel to fit your wrist.  The fit will all depend on how you like to position the cuff on your arm or wrist. 
You can wear this anywhere....it's one of those that looks just fabulous with jeans or a smart work outfit.  It really does catch the light and what a talking piece!
Measurement are:
Widest point on the cuff is 6.5cm (without manipulation, but can be wider)
Width across the top is 5.1 cm which is the width of the Radial Bearing itself.
Height is 6cm
This will be packed in a black box with a matching black, satin ribbon.