|I just came across this bit of information that might be useful for those of us who sew patterns made on a different continent.
For kids sizes I've learned to use both sides of a tape measure with inches on one side and centimeters on the other.
Here are some guidelines for adult sizes:
Women's suits and dresses:
Brit size numbers are 22-24 more than American; Euro numbers are 28 more than American
(ie, Am 10 = B 32-34 = Euro 38 ; Am 22 = B 44 = Euro 50
Women's blouses and sweaters:
Brit numbers are 2 more than American; Euro numbers are 28 - 30 more
ie Am 6 (S) = Brit 8 = Euro 34-36
I don't have much experience in patterns other than US, so if there are inaccuracies here, let me know! My source (a littlte general information almanac) doesn't list pants sizing -- maybe the same as suits?