For example: http://www.7camicie.com/?lang=en
I know that they are supposed to exist all over the world, but so far I have only seen their shops in Italy. I haven't been there for some years, but last time I was in Rome I saw their shops everywhere.
I normally get my shirts bespoke because OTR shirts tend to fit me badly, but I bought two shirts in one of these shops and the fit was OK and I am still quite happy with them (although my housekeeper has made her very best to destroy one of them by applying excessive pressure on the iron, to get the collar nice and shiny), and a friend of mine has a few of them and they fit him great and look good; nice stripes and colours. This is not high-end stuff, it is quite cheap I believe to recall, and I must say that I think that it is OK value for money.