Obviously you were lucky: Soviet standards were pretty diverse (non-russian republics getting the best housing and wares, then Ukrainian and Belorussian SSRs, and finally the worst ones for RSFSR).

Here you have a typical plan of block khruscheba: http://ic.pics.livejournal.com/volgodim/14339505/26623/26623... I've seen quite a few of those. 5.8 m^2 kitchen. All over Russia.