it probably is because all lacoste clothes are mad with the same type of brand you got ripped off and those lacoste shirts arent cheap either im only 14 and i would stick with american eagle and aerpostal and ab-n-fitch.
They are all men's sizes. Size 3= US XSmall, Size 4=US Small, etc. So, if the shirts you bought say "3" then chose XS/EUR3. Hope this helps.
Anywhere in China can run these off for pennies ... however you have to watch out for scammers (they supply really good quality samples & then either ship rubbish by the container load or don't bother to ship anything at all). (Other possible sources...