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.
The show is here vashoncenterforthearts.org/the-koch-gallery/
It's a group show featuring people in the community that work in fiber.I really do think your idea of a toggle might work for the sweater. Thanks @jamethiel!