How do you say '' Your eyes are bigger than your stomach''? or indeed '' To bite off more than you can chew'' as Gabrialla has so kindly added below.
Tus ojos son mas grandes que tu estómago , ok, word for word, but this is not what the English expression means, it means you've got more on your plate than you can handle.
Is there a proverb or refrán in Spanish that has the same meaning?