Lucky brand knitted sweater long sleeve cardigan size small

Lucky brand woman’s size small long sleeve knitted cardigan sweater. Do feel this fits alittle bigger and could fit a medium. The button seems slightly loose when not done up but when done up it looks and feels perfect. still has the other button attached on the inside as seen in photos. Pet and smoke free home. Has Measurements provided below. Please note these are approximate and were taken with sweatshirt laying flat with the button done up without adding any stretch. Pit to pit 18 1/4 inches Shoulder to bottom 21 1/4 inches