This paper reports the results of measurements performed on five standard weights of class F2, by several metrology laboratories throughout Romania. The comparison began in 2009 and concluded in 2010. Mass Laboratory of National Institute of Metrology (INM) acted as pilot laboratory (PL) and reference laboratory (RL) for the programme. Five standard weights of class F2 (nominal values: 5 kg, 1 kg, 200 g, 100 g and 10 g) were sent to the participants.