How much should I tip the movers?

[BadBoyBenny]

I am relocating for work. I move in to the new place tomorrow. My company pays for the movers to pack and load and deliver my stuff.

This means that they box everything up, take clothes out of my closet in the old place and put them in the closets in the new one, etc.

I did not tip them anything when they picked the stuff up because it will be the same guys delivering and I want to see what condition the stuff arrives in before deciding how much to tip if at all.

I only have enough stuff to fill a 700-800 square foot one bedroom apartment. They were able to pack and load all of my stuff onto the truck in about 3 hours and 15 minutes.

What is a standard tip (is tipping standard?) assuming everything is delivered in good shape?