This has turned out so amazing. It is beautiful, the colors work so well together and the pattern looks so intricate. You have done a great job pulling this together.
Where are you submitting it to?
No closure looks fine, alternately, some kind of simple wooden toggle buttons might look cute.
I really do think your idea of a toggle might work for the sweater. Thanks @jamethiel!
The show is here vashoncenterforthearts.org/the-koch-gallery/
It's a group show featuring people in the community that work in fiber.