What size is the hard front brake line on 72' XS650 going into the caliper?

[Bracan]

Looking to replace the old line with a new and have no idea what size this is. Please help! 72 XS650 front hard brake line going into caliper. Thanks!

 

[GLJ]

I would take the easy way out. It was used on a lot of models.
http://www.nichecycle.com/ncs/categories/brakes/brake-lines-fittings/yamaha-brake-pipe.html

 

[Bracan]

Thank you! Purchased!