What size clothing is a 6?
Unfortunately there is no standardization in women's clothing. What may be a size 6 in one manufacturer's line might be an 8 or a 10 in another's. This is the reason that women spend so much time in the dressing room, to determine if the clothing fits. The best answer is that you wear a particular clothing size by a particular maker. This is what it means to wear "Liz Claiborne" or "Mizraki" or "Tommy Hilfiger"...they have a standardization within their lines for size.