ごちそうは小人数ほどよい。の英語

The fewer the better.

The fewer, the better.

The less said the better.

That's better the more there is.

We are a small family.

on the small [large] side

a respectable minority

That amount is pretty small.

As is to be expected, there are not very many first-string players.

They may eventually run to a considerable number.

Not many people have regular bowel movements.

There are large ones and small ones.

being very slight in degree

Though he is so tall, he is a mere child.

There are very few trees, if any.

The amount is so small that it hardly counts.

Your children are so big!

(of quantity) a small

a small minority of the population

You want something a little larger, maybe?

There are few, if any, such men.

There's little (wine), if any.

It is quite a big number.

I think it's too big.

I think that it's too big.

of amount, being not scant

of a person, being a big talker

of something, having a small quantity

I think that it is too big anyway.

We are not numerically strong.