The ss-520-5 rocket from japan (https://en.m.wikipedia.org/wiki/S-Series_(rocket_family) ) is probably as close you can get with 4kg to orbit.

Height 9.54 meters Weight 2600 kg Diameter 52 cm

The SS-520-5 rocket from Japan is probably as close you can get with 4kg to orbit.

Height: 9.54 meters 
Weight: 2600 kg 
Diameter: 52 cm