October 1, 2007


Securities and Exchange Commission
100 F Street, N.E.
Washington, D.C. 20549


ATTN:      Ms. Patsy Mengiste
           Document Control -- EDGAR

RE:      RiverSource Dimensions Series, Inc.
                  RiverSource Disciplined Small and Mid Cap Equity Fund
                  RiverSource Disciplined Small Cap Value Fund

                  Post-Effective Amendment No. 79
                  File No. 2-28529/811-1629
           Accession Number: 0000950137-07-014640

Dear Ms. Mengiste:

Pursuant to Rule 497(j) under the Securities Act of 1933, as amended, please
accept this letter as certification that the prospectuses and Statement of
Additional Information for the above-referenced funds do not differ from that
contained in Registrant's Post-Effective Amendment No. 79 (Amendment). This
Amendment was filed electronically on September 26, 2007.

If you have any questions regarding this filing, please contact either Katina
Walker at (612) 671-6990 or me at (612) 671-4321.

Sincerely,


/s/ Christopher O. Petersen
---------------------------
     Christopher O. Petersen
     Vice President and Group Counsel
     Ameriprise Financial, Inc.