I've got a standard set of Staples Arc dividers but there's just the five sections and I need at least seven.
My bullet journal is colour coded. I've cut a strip of each colour 2cm x 5cm. Each strip is folded in half and the corners rounded.
I've labelled them with letter peel offs.
And stuck them to each of my section cover pages with two bits of tape.
It's nice to have my colour coding so visible on every page. Hopefully these dividers will be sturdy enough to last a while.