someone's eyes are bigger than their stomach

US /ˈsʌm.wʌnz aɪz ɑːr ˈbɪɡ.ər ðæn ðer ˈstʌm.ək/
UK /ˈsʌm.wʌnz aɪz ɑːr ˈbɪɡ.ər ðæn ðer ˈstʌm.ək/
"someone's eyes are bigger than their stomach" picture
1.

avere gli occhi più grandi dello stomaco, prendere più cibo di quanto si possa mangiare

to take more food than one can actually eat

:
He ordered three main courses, but his eyes were bigger than his stomach.
Ha ordinato tre portate principali, ma i suoi occhi erano più grandi del suo stomaco.
I think my eyes were bigger than my stomach when I filled my plate at the buffet.
Credo che i miei occhi fossero più grandi del mio stomaco quando ho riempito il mio piatto al buffet.