Best way to configure Snipe-IT to work with 12mm labels?

[flibberdipper]

I'm preparing to purchase a Brother PT-P700 with 12mm tape because I've just accepted the fact that printing off single Avery labels is a far greater PITA than I want to deal with, but I'm not entirely sure what the best way to go about configuring it is. As it sits right now, these are my current settings I use for Avery 8167 labels (with the QR code enabled), and it works out just about perfectly (here's a sample from when I was using the demo). If anything else I'd want the QR code a bit further left so the text can have a bit more room, but I'll just have to figure that out later.

I know on the readme there is an example for custom CSS with 24mm tape, but I have no idea what I'm doing when it comes to said custom CSS to make it work for my use-case so I'm really hoping someone here actually knows what to do and is willing to help me out.

EDIT: lol clearly this never got really resolved