I often mix this type of casual sweater with a plaid or denim button down shirt but I wanted a bit more sophistication in this outfit. (colorandgrace.com)
Aside from the boots, I have recently been obsessed with pairing casual sweaters with flowy skirts. (tweedandlace.com)
This is an extremely versatile look, which can be used to dress up your more casual sweaters. (justthedesign.com)