How do you spell a sigh of pleasher?

There's no single word to spell a "sigh of pleasure." It's usually described with a phrase, like:

* A sigh of contentment

* A satisfied sigh

* A sigh of relief

* A blissful sigh

* A sigh of pure joy

You could also use "ahh" or "ooh" as onomatopoeia to capture the sound of a sigh.