New Seasalt Cornwall sustainable tartan checks cotton summer dress size 10-12

This dress has just been tried on and washed, so it is in perfect condition. It is from the British clothing company Seasalt, which make ethical clothing. This was one of the nicest dresses from this season, but unfortunately does not fit me well. The dress is made of a soft cotton and it is lined. The dress fits a bit tight. Could fit someone size 10 US or 12 US. However the size is a UK 16. Please ask all questions before buying. Thank you.