Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
dimension [daɪˈmɛnʃən] n (measurement) измере́ние; (also pl, scale, size) разме́ры mpl (aspect) аспе́кт
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.