It's the same with a person's feet - no two hands or feet are the exact same size.
Here's an easy (pseudo scientific) method to find out how much bigger:
-Full a jug (a little longer/deeper than your hand) with water to about 75% capacity and mark the waterline on the jug with a marker.
-Dip your fully extended right hand in there touching the bottom with your index finger - make a mark to where the waterline is now.
-Remove your right hand and hold it over the jug for a moment to catch the dripping water from your hand.
-Now do the same for your left hand.
If the waterline doesn't fall in the exact place on both measurements -guess what - both hands are not the same exact size!!
If you perform some basic Fluid Mechanics (basic physics) equations you can actually determine to the exact degree the volume difference between the two, given the displacement of water in the jug.
If you do this at work, chances are you will be certified as a guitar playing physics nut!
I'm having a less-than-trilling day at work as well.
BTW...your clips and playing are killer!
Cole