Vintage wool tweed Garfinkles dress gavi 60s midi dress

Warm and classy wool dress From Garfinkles in Washington “Gavi” Guessing it’s from 50s to 60s Can be worn with or without the belt, waist has cute gathered detail Back zip Underarm to underarm measures 17.5” Waist 14.5” Hip 18” Shoulder to hem 41” I would think a modern size 2-4 but please compare measurements Tweed is black and grey with multi color flecks So unique