So I usually do this with my hair dry because i like the results on my hair best, but wet works too! It will just take longer to dry of course :)
Hold your hair in a pony tail
And twist to the ends. I take my hair and keep twisting it up wards, then bring it forward like so
Start circling it around into a bun from the forward position
The tighter you twist it, the more wavy it is. And the tighter it is, the less time it needs to stay in a bun.
You can wear it to sleep or even just an hour! Usually when I wear it tightly twisted for an hour I get these results :)
Thanks for viewing! Hope it works for you :) if you have any questions ask!! I'd be happy to help. Ps: my hair is naturally straight.
NEW: After doing the bun dry, I slept in it over night and flipped my hair a couple times and this is the result. Noticeably wavier than the photo before!