I am positive! It also depends on the website you are looking at. On Bal's website they even state that the 42 is a size 8/10 and the 44 is a size 10/12 but this jacket is made small and that is what the sales staff at BalNY told me. I am 6'1" tall and wear a size 10 jacket. I am a 36C and I could not zip the size 42 over my boobs but the sleeve length was amazing on me. The sleeves will probably be very, very long on someone who is vertically challenged. Call the staff at any Balenciaga store and I am sure they will help you in finding the perfect fit. I went so far to even ask the gentleman I was speaking to to try the jacket on because he is just slightly shorter than I am and almost the same build.
are you sure? cause all the conversion charts I look up say that a UK 8 is a US 6? and that a 44 is a US 14 and UK 16? my head is spinning.