Whatever the dimensions of your staircase, there is bound to be a stair rod or clip to fit.  Stairrods (UK) cut all of their rods to measure and will also supply specially curved ones for spiral staircases.  There are seven metal finishes available: brass for a traditional look but also, satin brass, chrome, satin nickel, black, bronze and pewter.  This means you can match your stair accessories to other accessories such as door handles, mirrors and lights.