Beautiful Green Vintage Mid-length Skirt Pleated

Beautiful mint colored skirt womens vintage with belt and gold belt buckle that pushes through holes to close, everything zips, snaps and slides together, has an “M” and says iris on back of belt buckle, one snag in back of skirt pictured The color isnt the exact same in the pictures so i do apologize Measurements in pictures I do not know the size if you know please help me hahaha Im guessing that its a 5/6 to a 7/8