[en] Subsize specimens in Charpy impact tests has are a valuable substitute to predict the ductile-to-brittle transition temperature (DBTT) and the upper shelf energy (USE) anticipated for full size specimens where volume limitations exist. The subsize specimens have been applied to testing of several steels and the data has been compared to those of standard full size specimens. The common normalization on the basis of fracture area does not produce any correspondence between the two different sized specimens therby showing an apparent decrease in both USE and DBTT by using subsize specimens. (orig.)