powersteering fluid copper hose diameter?

yep another problem..fix one thing and another breaks!

this time I have somehow broken off the copper/brass(looks like the brake lines) whatever it is end whilst trying to take off a leaky powersteer hose I was going to have replaced.

Its located under the engine and where the copper meets the 1 inch rubber hosing..I need to re flare it so does anyone know what size this pipe is cause I need to buy a flare kit and I dont know if its metric or imperial or if this matters?

Has anyone done anything this stupid and annoying to their car? Its such a pain in the ass to get to as well and all covered in powersteer fluid too..I thought it was undoing a little bit easy too but I kept turning over the spanner anyway..

any help would be muuuch apreciated