This item was an online retailer return but does not appear to have been used. It was likely returned due to being the wrong size so it may have been tried on. It does not come with tags or packaging but does not have any stains or defects. 

Small: neck 6.6"-8.5" chest 9"-12"

Medium: neck 7.5"-9.5" chest 11"-13.5"

Large: neck 9.3"-10.6" chest 12.2"-14.2"