I don't want a 'computer' that fits in my hand, those have existed for years.

You can fit five of them in your hand.

It was a small round object that fit easily in my hand, lightweight.

It does many different things like a computer but is small enough to fit in someone's hand.

More than a billion would fit in your hand.

It was exactly the size of a paperback book, small enough to fit in Carl's hand easily.

I picked up a good-sized rock that fit nicely in my hand.

My life depends on a creature small enough to fit in my hand, he thought.

Instead, at her station, he saw a white object with pentagonal sides, small enough to fit in his hand.