The only bigger one I've got, which I haven't perfected yet, is estimating in "orders" of trillions. Atoms and molecules are on the order of a trillion squared (trillion^2) smaller than human scale, and the largest things are on the order of a trillion squared larger, so the whole world looks like it could span 4-6 orders of a trillion, or a trillion^4 - trillion^6. A trillion is 12 orders of magnitude. A million is 6 orders of magnitude and a billion is 9 orders of magnitude. National debt is right now in the trillion^1 range, actually it's between trillion^1-trillion^2, and like I said, the largest things seem to be around trillion^2-trillion^3 as compared with us, and trillion^4-trillion^6 larger than the smallest things we know about.
1 trillion^1 = 1,000,000,000,000 (12 orders of magnitude)
1 trillion^2 = 1,000,000,000,000,000,000,000,000 (24 orders of magnitude)
1 trillion^4 = 1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 (48 orders of magnitude)
1 trillion^6 = 1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 (72 orders of magnitude)
1 googol = 10,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 (100 orders of magnitude)
The entire universe is on the order of 1 trillion^4-trillion^6 larger than subatomic particles and gamma radiation and other Planck-scale-range things. For reference 1 trillion^2 atoms of iron is about 1/5 of a pound, a little over 3 ozs or 3/4 of 1/4 lb.
I think that the Catechism teaches 10-100, or 100-1000 moral commands.