It's about 0.00000000001 times as long as The Diameter of Earth
In other words, 128 microns is 0.000000000010034279 times the length of The Diameter of Earth, and the length of The Diameter of Earth is 99,658,381,000 times that amount.(Equatorial)
The Earth — not a perfect sphere, but rather an oblate spheroid with bulged middle — has a diameter of approximately 12,756,273,000,000 microns at the Equator. The first complete view of Earth's diameter was in a photograph taken from a V-2 rocket launched in 1946 by the United States Army, which reached an altitude of 104,607,360,000 microns.
It's about 0.000000000003 times as long as The Circumfrence of Earth
In other words, 128 microns is 0.0000000000031940101 times the length of The Circumfrence of Earth, and the length of The Circumfrence of Earth is 313,086,050,000 times that amount.(Equatorial)
The Earth — not a perfect sphere, but rather an oblate spheroid with bulged middle — has an Equatorial circumference of approximately 40,075,014,000,000 microns. The first airplane trip around the circumference of the Earth (with a few stops along the way), was completed in 1924 by the United States Army Air Service, and took 175 days.
It's about 0.0000000000004 times as long as The Distance from Earth to the Moon
In other words, 128 microns is 0.0000000000003329549 times the length of The Distance from Earth to the Moon, and the length of The Distance from Earth to the Moon is 3,003,410,000,000 times that amount.(a.k.a. Luna) (median of semi-major axis, or apigee, and semi-minor axes, or perigee)
The orbit of the Moon around the Earth is elliptical, with an average distance of 384,436,500,000,000.0000000000000000000000 microns from center-to-center. About 428.376 kg of moon rock have been cataloged on the Earth, from the American Apollo and Soviet Luna Programs, and from samples that have been extracted from meteorites.