brake hard lines

[Eta Epsilon]

Car is a 86 ETA.
I need to redo the brake hardlines.
I never done it before, but I saw a couple of videos on how to do it and read a bit about it.

Can anybody tell me what diameter are the brake line on my car? I'm talking from the master to the back of the car.

thanks

[Alecs MacDonald]

I'm not sure about the exact diameter but you can still buy the lines new from bmw last time I checked. Problem is they don't all come prebent.

[KVF]

3/16ths bubble flared.