Best analogy to compare sun's size relative to milky way?

The Milky Way is about a hundred thousand light-years across, and the disc a thousand light years thick. The Sun's diameter is about 0.00000014 light-years.

So the best analogy I have is that the Sun in comparison to the Milky Way is like one plankton in comparison to the Pacific Ocean.

Sun's diameter: 1.38 × 10^9 m.

Milky Way's diameter: 100,000–120,000 ly (light years).

Now the size ratio:

110,000 ly / 0.000000146 ly = 753,424,657,534 times.

So if The sun were the size of a golf ball, the Milky Way galaxy would be 753,424,657,534 times bigger.

Diameter of a golf ball: ~1.6 in or 4.3 cm.

So the object in comparison should be:

(4.3 cm * 753424657534) / 100,000 (to get to kilometers) = 32,397,260.274 km in diameter.

So if our sun were to be a size of a golf ball, then the entire Milky way galaxy would fit into the orbit that is about the same size as half the orbital distance of Mercury to Sun.

EDIT:

What is important, is the size ratio between two objects. So no matter what the object you take for the Sun, the object for Milky Way should be 753,424,657,534 times bigger in diameter. Hope that helps.

If the Milky Way is the Sahara, the sun would be a grain of sand in the parking lot in JFK.

2mm, the diameter of a pencil lead, in comparison to the Sun itself. There isn't anything in common human understanding on both ends of that range.

Earth's orbit compared to this http://www.rikoo.com/ProductImage/DH2800038/Red-Ja... red jasper sphere.

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Like a speck of sand on the beach?

I think so...