This shows the sun and planets to scale. Earth is the 3rd planet from the left.
The diameter of Jupiter is 11.20 times the diameter of earth.
It looks even larger because the volume of Jupiter is 1,403 (=11.2^3 cubed) times the volume of earth.
In file planets_5_160415aa.stl I have corrected the diameter of the sun per stefanpwinc's comment. this file does not include pluto
file planets_(21)_w_pluto_r1_180109.stl includes pluto per keebie81's and wbphelps' request. Pluto's diameter = 2370 km. Our moon's diameter = 3476 km. So pluto looks very small. This object was created in BlocksCAD https://www.blockscad3d.com/community/projects/70342
added the BlocksCAD and SCAD files (.xml and .scad)
for those who would like the geometry:
reference: pages 6 and 7 from https://www.nasa.gov/pdf/622145main_SSML1Answr.pdf
diameters in kilometers
d_mer_km = 4878;
d_ven_km = 12104;
d_earth_km = 12755;
d_mar_km = 6790;
d_jup_km = 142796;
d_sat_km = 120660;
d_sat_rings_km = 2 * 136775;
d_ura_km = 51118;
d_nep_km = 49528;
d_plu_km = 2370;
d_sun_km = 1392600;
! scale factor = 2.25