The label shows M but I normally wear medium garments and this one does not fit me and this is why it's been sitting in a drawer since I bought it some time ago

the pit to pit is 17 inches so I'd say it's more of a SMALL in size - I normally wear 22 inch chest tops so it's just way too small for me

They retail at £39 on the Reed website - just trying to recoup half of the money (listed for £19 then additional costs are added automatically)