Discussion for new flags:
https://imcdb.opencommunity.be/forum_topic-9524-82829-Libyan_flag_change_needed.html
I replaced the old set by a set extracted from Wikipedia, with more real flags.

The reason why some look wider is because in reality not all flags have the same ratio.
e.g. USA and Australia indeed are wider,
10:19 for USA https://en.wikipedia.org/wiki/Flag_of_the_United_States
1:2 for Australia https://en.wikipedia.org/wiki/Flag_of_Australia
By comparison, Switzerland has a square flag:
https://en.wikipedia.org/wiki/Flag_of_Switzerland