White cropped sweater with large rainbow M

This sweater has never been worn. I think I bought it 20 plus years ago at Delia’s, but there are no tags on this. I remember it being flat wrapped, but just never got to wearing it. It is a white cropped sweater with a large rainbow in front. Excellent Condition. I am going to say size Medium, but there are no tags, so please see photos for more details and measurements