Size Calibration Standards include five highly uniform unlabeled microbead populations of different diameters (~4-11µm), which can be used to construct calibration plots for electronic volume and light scatter instrumentation.
A test requires one drop (50μl) of particle suspension, which is equivalent to ~100,000 particles. Bangs Flow Cytometry Standards are 7-9μm in diameter (unless otherwise noted) to approximate the size of human lymphocytes.