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.

avoir les yeux plus gros que le ventre, prendre plus qu'on ne peut manger

to take more food than one can actually eat

:
He ordered three main courses, but his eyes were bigger than his stomach.
Il a commandé trois plats principaux, mais ses yeux étaient plus grands que son estomac.
I think my eyes were bigger than my stomach when I filled my plate at the buffet.
Je pense que mes yeux étaient plus grands que mon estomac quand j’ai rempli mon assiette au buffet.