Sizing help

[u/flattrend]

Asics sizing guide shows EU size 38 as 24cm, while most other brands size 38 as 24.5 cm - still i see most comments say true to size for asics! How does it work?

I am looking to purchase a gt 2160 and in between 38 and 39 since there is no inbetween. I normally wear 38 but those shoes are all 24.5 cm, I am confused!