1997 Civic CX. Blew a brake line. Just wondering if anyone knows what fittings I need, and the size of the brake line needed. Thanks.

 

hard line or the rubber line?

 

Hard line.

 

My fuel return line blew under my car (97 CX what up, bro?) last winter. When I went to pull it from the cage, the brake lines blew with it. I had to bend and install every.

You'll need metric single flare (37 degree) fittings.
You've two options.
You can re-plumb your lines by buying a reel of hardlines (you need to confirm but, from memory I think the brake and fuel feed lines are 3/16 and the fuel vent is 5/16) and rent a hardline straightening tool (very hard to straighten the reel without it), buy a bending tool, and buy/rent a flare tool.
Or, you can do what I did and backyard shade tree repair it with sections of pre-flared lines from the autoparts store that have fittings already on them. Measure what you'll need and bend them to match the original lines. Stagger the connection points. It's not great but it has survived so far. Total cost for parts was ~$180 and I got it done in a weekend.

Yes, I tried buying OEM lines. I placed the order and they called me to cancel it because they couldn't ship it.
Yes, I tried buying from a donor car but the guy I picked them up from ended up donating them to me because they were so rusted. (Thanks Tall_Kyle. You're standup tall guy)

If you're repair is extensive as mine was, you will need to drop the fuel tank.
I can't remember exactly but I'm pretty sure I lowered the engine cradle to get the lines between it and the firewall.
Don't be that guy who uses a box end wrench on a brake/fuel line only to realize there's no way to remove it. Get line wrenches.