tip for anyone who needs new wipers and has 10 minutes to spare!
Wilkinsons sell wiper blades in 22" (driver) and 21" (passenger) sizes for a 156.
The arms fit fine, but I spent a few minutes swapping the good rubbers over to the genuine Alfa rubber holders as they are better quality. All you need is a pair of pliers/flat blade screwdriver to prise the first holder/pull the rubber through.
They are a vast improvement, and 2 weeks on with torrential downpours, they are working admirably.
Or you could spend £20 buying some similar rubbers on line! I know what I would do!
Alfa Romeo history in order - 156 Sele, 156 Sele, Spider 156jtd facelift, 147 1.6, 156 GTA, GTV 3.0, 156jtd, 145QV, 156GTA, 145qv