One of the major flaws of Wonder Woman was too much of characters focusing on Wonder Woman’s attractiveness and too little focus on how unusual and extraordinary she would have seemed in 1918 London — far more and in utterly different ways than the movie stressed.
People wouldn’t have noticed that she was pretty. At least not at first. They’d have noticed that she was an assertive, dominant giant.
Average male height in the UK in 1918 was around 168cm. I can’t find specific figures for London, but at that time people in most major (especially very polluted cities like 1918 London) were shorter. But we’ll go with 168cm or 5’6″.
There is no canonical source for Wonder Woman’s height, but many list her as being 6’3″ or 190.5cm. Gal Gadot is herself 5’10” or 178cm.
Gadot herself — not Wonder Woman — would’ve towered over the average man of the time, and would’ve likely been taller than nearly every man she encountered — if using only Gadot’s natural height, not Wonder Woman’s likely stature. In other words, Gadot herself would’ve been nearly a head taller than most men of that time.
Wonder Woman, though, would’ve been just herculean as compared to the average male in 1900s London. She would’ve absolutely stuck out (not for that alone, but certainly for that more than her beauty).
Gwendolyn Christie is 6’3″. Here she is next to a guy who is 5’8″. Consider that the average male height at the time was a full two inches shorter than that.