flexo pet suggestion?

Hi,
I’m doing my first build. I see some of you have used “flexo PET” nylon cover for your wiring.
Which diameter of the PET product should I use?

Thanks.

3/8" is easy to do but you can go smaller with some patience.

Great question Dalton, I would have never (well maybe at some point in time) thought of using wire loom. Pics look great Ryan.