| PARAMETER | TISSUE | PROBE |
| VOLUME | thyroid gland | CAVALIERI/POINT-COUNTING |
| VOLUME FRACTION | colloid, cuboidal epithelium | AREA FRACTION FRACTIONATOR |
| NUMBER | cells | OPTICAL FRACTIONATOR |
| NUMBER | follicles | OPTICAL FRACTIONATOR* |
| VOLUME | cells, follicles | NUCLEATOR |
| HEIGHT | cuboidal epithelium | ORTHOGONAL INTERCEPTS |
| SURFACE | cells, follicles | ISOTROPIC FAKIR |
| LENGTH | fibers, vessels | SPACEBALLS |
*thicker sections and focal plane than for cells (see reviews)
