All true cells contain mitochondria. Stem cells, progenitor cells, and red blood cells do not contain mitochondria.
In shape it is round, rod, oval, star or coil shape.
Mitochondria make up 20% of cell volume. Mitochondria are typically 3-40 microns in length and 0.2-2.0 microns in diameter. Rod mitochondria are 9 microns in length and 0.5 microns in width. Circular mitochondria are 40-70 microns in length. Circular mitochondria are 0.2-2.0 microns in diameter.