I am a 10 m and got the 10. it fits perfectly and there is room in the bust (i'm 36/38 c). the shirt feels very nice and silky up to the skin. i'm just not sure about the print- i got the umbrellas. it's cute, but maybe a little too cartoonish? it does look good with a green or blue puffy vest for colder days...still trying to decide if i should keep or return, but only b/c of the print. i'd love this in some solid colors!