Well, XL for whom? I'm a Spanish and Japanese Large but a Medium everywhere else. The average of the land will dictate the label sizing... HOWEVER, there is a really interesting phenomenon called 'vanity sizing'. Mentally, people feel better wearing smaller sizes as a matter of vanity, so cheaper clothes brands will make clothes that are bulkier but have smaller listed sizes. This leads to things like Old Navy jeans with a waist of 30 fitting like G Star Raw jeans as size 32 (something I've encountered - yes, it's in Men's clothing as well.) Because this has gotten so out of hand, the smallest of women's sizes have been forced into a 'negative zone' - you may have heard of size 0 and size double 0 - these exist now because of vanity sizing.