Just picked up a few dressing up outfits in the sainsbo's sale (stocking up for birthdays 
. Picked up two builder's outfits (one that dd1 chose for herself) and a surgeon's outfit. Wasn't paying attention to the builder's outfit but when I scanned the surgeon's one it came up 'Boy's surgeon's outfit'. They were all jumbled up so not divided into the usual annoying boy/girl divide but presumably the girl's equivalent is the nurses outfit.
I know people think it doesn't matter, but when they were jumbled up my daughter picked the builder's outfit, but when we were in Next they have toys near the counter divided up and dd walked passed the 'boy's' stuff, supermario, Lego, Ben10 and said 'those are boy's toys' and went to the Peppa Pig/Hello Kitty section and said 'these are the girl's toys'. So the artificial divide rather than the subject matter is having an effect even at 3 years old.