WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
MSDW SELECT DIMENSIONS SERIES-DEVELOPING GROWTH
</LEGEND>
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DECEMBER 31, 2000
<PERIOD-END> JUNE 30, 2000
<INVESTMENTS-AT-COST> 140,258,644
<INVESTMENTS-AT-VALUE> 173,602,884
<RECEIVABLES> 3,595,222
<ASSETS-OTHER> 64,678
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 177,262,784
<PAYABLE-FOR-SECURITIES> (1,205,592)
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> (208,892)
<TOTAL-LIABILITIES> (1,414,484)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 131,155,842
<SHARES-COMMON-STOCK> 5,748,985
<SHARES-COMMON-PRIOR> 4,010,824
<ACCUMULATED-NII-CURRENT> 204,111
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 11,144,108
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 33,344,239
<NET-ASSETS> 175,848,300
<DIVIDEND-INCOME> 35,229
<INTEREST-INCOME> 660,794
<OTHER-INCOME> 0
<EXPENSES-NET> (486,521)
<NET-INVESTMENT-INCOME> 209,502
<REALIZED-GAINS-CURRENT> 11,271,652
<APPREC-INCREASE-CURRENT> (29,607,787)
<NET-CHANGE-FROM-OPS> (18,126,633)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (9,373)
<DISTRIBUTIONS-OF-GAINS> (30,566,098)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,236,323
<NUMBER-OF-SHARES-REDEEMED> (497,616)
<SHARES-REINVESTED> 999,454
<NET-CHANGE-IN-ASSETS> 15,253,257
<ACCUMULATED-NII-PRIOR> 3,982
<ACCUMULATED-GAINS-PRIOR> 30,438,554
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (443,923)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (486,521)
<AVERAGE-NET-ASSETS> 178,544,675
<PER-SHARE-NAV-BEGIN> 40.04
<PER-SHARE-NII> 0.04
<PER-SHARE-GAIN-APPREC> (3.05)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (6.44)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 30.59
<EXPENSE-RATIO> 0.55%
</TABLE>
