Do you feel short in Australia?
I live in Melbourne (2nd largest city, over 5 million people), and honestly I can't generalise about how I feel as a whole, as it's dependent on a lot of things like demographics and location. I grew up in the western suburbs of my city, where the demographics are mainly southern Europeans, south east Asians and south Asians. Out of my friend group of around 10 people (18 yr old southern European males), a good 70% of us are within 170-178cm. In my high school (I went to a public, government funded school), most of the boys at age 18 were around my height or a bit taller, with 90% of them being under 6 foot. Most of them also had southern European backgrounds. Growing up during school, I did not feel short at all. Upon entering university in the city centre, I suddenly felt much shorter. Most of the European students are of British origin and are noticeably taller than I am. My university tends to have many Chinese international students too, who are slightly taller than I am.
When I go out in the western suburbs, I don't really feel short due to the demographics of the area. However when I travel to the city centre, go to places where youth from all demographics gather, then yes I feel shorter than average.
One thing to note is, for the past few years a majority of the immigrants have come from China, our city centre is majority populated by Chinese people now. This trend of majority Chinese migration is definitely going to continue for the near future, so you can expect the average height to possibly go down further here.