Actually, when meeting this person on the street, I would think of it as a feminine looking man, but when I met the person i a ladies room, I´d simply think of her being a bit masculine looking female, because otherwise I wouldnt expect her/him to be in the female restrooms. ^^
So I´d say that this person, does look a bit masculine for a woman, but because of her being in the woman restrooms, I´d think that she actually was a woman. ^^
But I cant tell, how much you can compare different cultures. Around here you normally have separated and closed stalls for the toilettes. So the washing room of the female toilette is not that of an sanctuary, because actually you have most often the "pampers change" desk in the woman washing room, so fathers that are with their kids need to go there as well. Just as more prude dads with little girls (that still need some assistance in butt-wiping or opening/closing cloths) mostly go with them to the woman toilette, because of them avoiding to go with the little girls through the man washing room, where the pissoirs are, and where the little girl could see some "male-facts". ^^ As well that the stalls are normally to small for two person in it, so when they do assist in but whiping or pulling cloths on or off, then normally the stall door is a open, and I think they dont want other men to see their half naked girl-butts. ^^
So as long as you dont stand creepy luring in a corner, with a knife behind your back, I think people would not be whondering that much. As well that at least for "openly" transgender people it is accepted to use the toilette of the gender, they feel towards themselve, if this can be related by optic. So even if it was fully recognizable by silhouette, ... that you were a men, if you are dressed as woman, so that people recognize that you feel yourself as woman, its for most people around here no issue.