This document lists the scale sizes of the planets in our solar system. Mercury is 0.49cm on a scale of 4.9km, Venus is 1.21cm on a scale of 12.1km, and Earth is 1.28cm on a scale of 12.8km. The largest planets, Jupiter at 14.3cm on a scale of 143km and Saturn at 12.1cm on a scale of 121km, while Uranus and Neptune are both around 5cm on scales of 51km and 50km respectively.

1. Mercury -> 0.49cm /4.9x1000km
Venus -> 1.21cm/12.1x1000km
Earth -> 1.28cm/12.8x100km
Mars -> 0.68cm/6.8x1000km
Jupiter -> 14.3cm/143x1000km
Saturn -> 12.1cm/121x100km
Uranus -> 5.1cm/51x100km
Neptune -> 5cm/50x1000km