There was still some distance to go, for a short ladder led through the roof to a platform little more than a yard square.

Two measure about a yard square; the others are close to four feet square.

Beyond the wall of equipment was a window, no more than a yard square.

He carried a box about a yard square and an inch deep.

And the mirror grew in size until it was at least a yard square.

Each indentation was at least a yard square and deep.

The target was a large affair, about a yard square.

The white floor tiles were a full yard square and gleamed like the moon.

The peak was no more than a small flat area a yard square.

All being well, I should be left with a gaping hole about a yard square in the wall of the target house.