My time as a model helped my *head* with this bigtime.
Did you know that clothing is made to fit a *fit* model? This is a man/woman whose measurements are supposed to be perfectly "X" amount of inches for this measurement and "X" amount for that - and perfect height. Then with mathematical calculations they size up and down, pettite and big/tall, etc. If the fit model shows up for the job and is not the size she is SUPPOSED to be, guess what? Throws the entire line off.
Since I found this out (a fit model was laughing about it during a swimwear gig we were doing together) I was like, "Cool, so it isn't ME it is the clothing." I am pretty intune with my body and my mirror works fine, so I know when I have put on some bodyfat or lost some muscle mass. I dont NEED the label on jeans to tell me something about ME that I already know.
I take clothing anywhere from size 0 to 6. I also wear children's sizes (because I am so short) 12 to JR 4. I also wear some men's pants because I like the way they sit on my hips. 28/32. (I like my pants to bag at the bottom).
Also you have to take into consideration the fabric - does it have give? If the fabric is stiff there is NO WAY I can get tops over my still really large lats and fake boobies so I dont even bother.
And yes, American clothing is cut bigger than European clothing because in general Americans are much fatter than their European counter parts - hence "relaxed fit" was born to make Americans feel less self-conscious about this FACT.