Wavier than 1b/1c, because that looks like wavy hair, not straight hair that has a little wiggle to it. I'm thinking maybe 2a/2b or something like that. 2a doesn't usually organize into distinct waves until below the shoulders, and it usually has a longer wavelength than that, so I think you're approaching 2b.
The straight ends are interesting. Could be that your hair has changed texture (it happens!), could be that maybe they've got damage that's keeping them from behaving the same way.
Bookmarks