I love open cardigans. You can dress them up, dress them down. Wear them open and casual, or belt them for a more structured look. This Striped Open Cardigan ($79) has a great mix of neutrals and a good length to it. I would wear it for weekends with these distressed black jeans and an ivory shirt. For work, I would go with a grey sheath dress and a pair black booties.
Looking for a neutral draped cardigan? More options in all size ranges in the comments.