The lens-shaped chloroplasts of higher plant cells are 3-5 microns in diameter. Spiral chloroplasts of Spirogyra are longer than the length of the cell.
Chloroplasts of algae are more diverse. In higher plant cells, chloroplasts are lens-like. Chloroplasts vary in shape in lower class plant cells. Spiral (Spirogyra), star-shaped (Zygnema), cup-shaped (Chlamydomonas), round (Pithophora), reticulate (Oedogonium), ribbon or ring-like (Ulothrix) etc.