We've found that mulberri styles tend to fit different. All shirts of the same style (i.e. layered look, traditional sleeve with cuff, raglan sleeve with no cuff, etc.) will fit the same. Comparing between styles is almost impossible. DS is in 7 for most other brands of shirts, but some styles of mulberri he still fits easily in a 5. I've never noticed a correlation between where the shirts are made, but I've never looked either.
Mom to Alex (2002) and Catherine (2003)
"The challenge of parenting isn't shaping your kids to be what you want, it's shaping yourself to be what your kids need." - Wellyes