Our Universe

[Mike]

Edit: Actually it's 214.5 metres in diameter, not 2.5km (assuming VY Canis Majoris is 1950 solar radii) in comparison to our Sun being 11mm in diameter.

I used 2100 AU for the diameter of VY Canis Majoris. Goes to show we really don't know how big it is, only that it's really big. 

Edit: Even if you did use 1950 AU for the diameter, it would be ~2.28685737 km.

((Diameter of Canis in km)/(Diameter of Earth in km))*(Diameter of salt granule in km) is what I used.