COS black blazer, single-button close & a relaxed, oversized fit, Women's Size 6 The COS black blazer is a stylish and versatile piece designed for women in size 6. Made from cotton, this blazer features a relaxed and oversized fit, perfect for a modern and effortless look. The single-button closure adds a touch of sophistication, making it a great addition to any wardrobe. Whether worn as a statement piece or layered over other outfits, this blazer is sure to become a staple in any woman's closet.