before buying this I thought I need an xs because I’m skinny and thought my boobs were small but I can’t even wear this top my boobs slip out I might need a medium recommend sizing up

I’m normally size small in tops and I usually like to show a lot of cleavage. however this was way too tiny, it barely covered my boobs. super cute but I wouldn’t recommend it for bustier girls. I’m 5’1” 125lbs and 34D for reference