This vest is unlined, so you can easily throw it on over a sweater. The tag says size 11. Please refer to the measurements below. Width: 48 cm Length: 57 cm The collar can be worn up or open. It doesn't wrinkle, making it perfect for travel! The collar string originally had a clasp on only one side. It's a sturdy vest. The beige color is easy to match with other outfits.