Plaid Zip Up Jacket

I always wear solids so I like these jackets bc they make solid basics more interesting as an overlayer...I ordered 2 in different sizes and both look fine. I think I like the small better but the med is not huge especially if there's a sweater underneath. I usually wear a 6 or 8 top and, honestly, both small and med look ok. Arms a bit longer/shoulders wider on Med. but not much.