Free People top lace back long sleeve

Free People top with Lace back , long sleeve, blue/grey front and and turquoise/green lace back, one of the tags is missing, but the other is in tact with RN #, overall top is in great used condition, OB/GB number confirms this is free people brand (see pic), UNSURE OF EXACT SIZE because of missing tag (low price reflects this), but would have bought this as a Size S or Size XS, see pics for details and any minor imperfections