It is marked size M, but this vest is kind of one-size.
The clean lines and the grey color makes it the perfect choice for autumn and winter.
It doesn´t have any close, but I will send you the hatpin, which I used in the first photo. Otherwise, you can find the belt in the shop too.(I didn´t take photos of it, cause it comes to my mind at the last minute, that you may love this combi)