Senchi Lark - medium (old sizing)

Well used but in excellent condition, downsizing my collection. No holes or tears or stains This is from the 2021 batch, so sizing is a little different. Use the measurements provided. I have a current Medium and this still fits me but is definitely more of a baselayer fit than a midlayer fit. I'd say its 1 size smaller than the current medium and fits similar to the current small