tag missing size 8 petite, cream coloured dress

size 8 petite, cream coloured, like new, pockets, body lined, sash belt, virgin wool. can only think the tag poked me so i cut it out. says size 8 but i know size 8 in the 80s is not the same as size 8 now. size 8 in the 50s was not the same as in the 80s, i learned that from my mothers clothes