Beautiful sweater with button detail in back size S

This is such a cute sweater. Back buttons are functional. I think you can use it to adjust to your size. In excellent condition. Pit to pit 18” can stretch to 20” Waist 17.5” Length 24” If the waist is too snug I guess you can open up a button or two, then it will have a split back look. A collared shirt would look nice with this sweater.