What Am I Riddles

Question: The shorter I am, the bigger I am.

What am I?

Question: What always goes to bed with its shoes on?

Question: There are several different kinds, but the one you pick doesn't do its job.

What is it?

Question: If you throw me out of the window,
I'll leave a grieving wife.
Bring me back, but through a door,
You'll see someone giving life.

What am I?

Question: Only one color, but not one size, Stuck at the bottom, yet easily flies, Present in sun, but not in rain, Doing no harm, and feeling no pain. What am I?