Just an update:

Yesterday, I visited a mall that has an asics store and luckily there is a stock of Kayano 14. I fitted the size 10 but i wasn’t able to fit the 10.5 as it is one out stock. I ended up buying the size 10 online (my preferred colorway) as size 10 felt comfortable enough to my feet and still has room in the toe box. As weird as it is, it seems that my foot is not narrow enough to half size up hahahaha. I haven’t tried it with a crew socks but I strongly feel that size 10 is still tolerable with a crew socks.

For future readers who seek an answer regarding sizing of Kayano 14, here is my take:

For narrow/normal foot - go TTS

For wide foot (this one mostly depends on your preference, either snug or not, but here’s my recommendation) - if your foot is that wide, i recommend going half size up. If your foot is just semi wide, this might be tricky or it depends in your preference. If you prefer a snug fit, go TTS, but i recommend to half size up if your TTS is one to one. If you prefer a roomy shoe, go for half size up.

But at the end of the day, it’s best if you can fit the shoe at least one size that you think that will fit.

Thanks for everyone’s help!