>>497445882'7 does in fact work as I have also submitted a 2'7 and was accepted due to the fact that the game rounds up the height value for this quest. Get it close enough (2'7.5+) and it works.
What's killing me is that this 0'9 Eevee doesn't exist. I've caught almost 200 Eevee trying to find this little fucker and I swear it doesn't exist