She let out a breath in a long, low sigh.

All of my breath went out in a long sigh.

After a moment she let out her breath in a sigh.

After a moment he let out his breath in a long sigh.

The fear went out of him in a little sigh.

The breath went out of him in a long sigh.

He let his breath go out in a long sigh.

His breath went out of him in a great sigh.

Then I let out my breath in a long sigh.

He held in a sigh, then took a deep breath.