Abstract: Amorphous micron-sized particles were subjected to a quasi-static compression. A nanoindentation flat punch method has been developed to determine the contact pressure–strain behaviour of single micron-sized amorphous particle. Four groups of particles with same chemical compositions but different diameters were tested. Particle diameters varied from 3.36 µm to 10.05 µm. Three maximum strain levels of 20 %, 30 % and 40 % at constant deformation rate have been applied in the plastic regime. Existing contact mechanics models were discussed and applied to the elastic and plastic regime.