Logarithmic light year scale...

I have devised this convenient Logarithmic light year scale i.e. distances
as Log10 (light years) with some examples:-

10 - Size of Universe [~10.1]
9 - The closest quasar 3C273 [9.3]
8 - Size of Leo Supercluster [8.7]
7 - Size of Virgo supercluster [7.7]
6 - Nearest Spiral Galaxy [6.3]
5 - Size of Milky Way [5.0]
4 - Distance to centre of Milky Way [4.7]
3 - Nearest black hole V4641 Sgr [3.2]
2 - Size of Carina Nebula [~2.3]
1 - Distance to Altair [1.2]
0 - The closest star Proxima Centuri [0.6]

This seems to be a much better system for expressing cosmological distances
than straight light years - any comments