The Free On-line Dictionary of Computing (30 December 2018):

Eurocard

   A range of standard circuit board sizes.

   Normal	       double Eurocard = 233.4 x 160 mm
   Extended       double Eurocard = 233.4 x 220 mm
   Super extended double Eurocard = 233.4 x 250 mm
   Hyper extended double Eurocard = 233.4 x 280 mm