Gavin
We recently bought flags from Stevensons of Glasgow, great service, in all yellow pages for Scotland under flags.
Flag sizes are usually proportioned by a 2 to 1 ratio, ie 6 foot long x three foot high.
Flags attach to the pulley ropes by toggles so dont worry about fixing, just pull the rope tight and its fitted.
Beware of banner box for flags, he gave me costs I then looked elsewhere, Stevensons were cheaper for the flags but not the poles.
When I called back to bannerbox for the poles he told me the other flags would not be up to scratch. They were heavier and the same size as his but he was very pissed off with me.
When the poles came there was a great chip on the dome of one, when approached for a replacement he said to chop the top off with a saw and he would give me a new dome for it. Six poles and one was then going to be four inches short!
He could not understand I wanted a new one, blamed the courier company and all sorts, not my prob I said and boy was he angry.
In the end it was the customer kicking up a fuss over the delay that sorted the problem, rub down with the sander and a coat of white enamel fixed the pole, should have been replaced really but they were all six meters high so nobody will ever know.