I have noticed that most often when you see a girl dating a guy shorter than her the girl is 5ft 7 to 5ft 10
very rare to see a girl below this height dating a guy shorter than her.
It could be that taller girls are natrually more prone to dating shorter guys and because of their own above average height value height in a partner less .....or it could be you simply see more 5ft 7 to 5ft 10 girls dating shorter guys because it's not massively unusual to see a guy 5ft 6 to 5ft 9 ....where as a guy of your height [5ft 3] is pretty rare, and if they are pretty rare then by that logic there won't be much of them to see dating a 5ft 4 to 5ft 6 girl in the first place.
I suspect though that taller girls do in fact have less aversion to dating shorter guys than shorter girls do ...because if a 5ft 8 girl mates with a 5ft 3 guy, the kid [male] will turn out around 5ft 8 ....which is a tiny bit below average for a male but still a pretty normal male height and should not greatly impact his chances with the opposite sex, ....however if a 5ft 3 male mates with a 5ft 0 female then the kid [male] will turn out around 5ft 4 ...and likely have trouble with females when he's older due to height.
Genetically speaking, a 5ft 8 woman mating with a 5ft 3 guy will produce male offspring which have a significant better chance of "making it" [obtaining a good/high quality mate and reproducing] than a 5ft womans child would [due to the males height disadvantage]
https://tall.life/height-calculator-how-tall-will-i-be/Therefore it fits into my theory that taller women are less fussy about height. As what is the primary purpose of reproduction? To produce offspring [preferably high quality so they will have greater chance of success] which will one day reproduce themselves ..and thus the cycle continues.
I am average male height [5ft 10], and years ago I noticed it was significantly harder for me to attract an attractive girl [5ft 4 and below] than a taller girl [5ft 7 - 5ft 10] ...and I think the reason again is simply taller girls are less fussy.
my advice: don't just go for girls under 5ft 3, try the taller girls too. They may just surprise you..........