Hi Guys,

Please excuse my novice description.

I've just bought an '07 Bianchi Pista for which I wanted front brake. So I picked up a brake lever which then didn't fit around the handlebar. The bar was too big for it.
So I went to another store where I was told I needed an over-size brake lever.. Got one of those, just got back and that doesn't seem to fit either as the lever is too big..

As I've been told they only seem to come in two sizes? Is this right?

Does anyone have any suggestions for what brake to get and where from (i'm based in London)

I appreciate your help in advance.