These are simple to do and you can make them in any size.
Here's the trick....
take whatever grapevine you can get and soak it
(I did mine in the bathtub)
for 24 hours.
Then while wet, twist and form into whatever size wreath you'd like,
as thick or as thin as you want.
(You can use wire to hold it in place until it dries if you need but it's better if it stays in the shape by itself.)
Here I did a 24", two 18" and a 12"
and they are ready for a little hot glue and some berries.
I'm so excited to get them finished!