Top /tank Pullover vest

Sage green in color this is a pullover vest, with beautiful open design yet would work well over a tank , or white basic button down tail hanging out for layered look or substitute a tee underneath! Multiseasonal, versatile piece it features large armholes like a muscle shirt , with slight high/low hemline !! Has “0” on tag for (one size )? Definitely not a tiny 0 It is a roomy medium and possibly a large