Sorry if I'm not doing this right. 1st actual post to a forum ever. Thanks in advance for your help!

We have a 2001 Honda Accord and the brake lines that run from front to back below driver side just totally rotted through. I'd like to replace the straight sections that I can get to with replacement lines and brass compression fittings.

I just can't find out what size the lines are so that I can buy the correct size replacement lines. I'm guessing that they are metric and they seem like about 3/16" of an inch but they're totally corroded and I can't be sure.

Does anyone know what size they are?

I downloaded the service manual but I can't locate the information in there either.

Thanks again,
Andy