<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
COMPANY'S CONSOLIDATED BALANCE SHEET AT JUNE 27, 1998 AND FROM THE CONSOLIDATED
STATEMENT OF OPERATIONS FOR THE 3 MONTHS AND THE SIX MONTHS ENDED JUNE 27, 1998
CONTAINED IN THE COMPANY'S QUARTERLY REPORT ON FORM 10-Q AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000910721
<NAME> DM MANAGEMENT COMPANY
       
<S>                             <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   6-MOS
<FISCAL-YEAR-END>                          DEC-26-1998             DEC-26-1998
<PERIOD-START>                             MAR-29-1998             DEC-28-1997
<PERIOD-END>                               JUN-27-1998             JUN-27-1998
<CASH>                                          19,300                  19,300
<SECURITIES>                                     3,898                   3,898
<RECEIVABLES>                                        0                       0
<ALLOWANCES>                                         0                       0
<INVENTORY>                                     20,036                  20,036
<CURRENT-ASSETS>                                57,544                  57,544
<PP&E>                                          32,579                  32,579
<DEPRECIATION>                                       0                       0
<TOTAL-ASSETS>                                  94,602                  94,602
<CURRENT-LIABILITIES>                           42,732                  42,732
<BONDS>                                          3,627                   3,627
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                            95                      95
<OTHER-SE>                                      48,148                  48,148
<TOTAL-LIABILITY-AND-EQUITY>                    94,602                  94,602
<SALES>                                         59,359                 104,151
<TOTAL-REVENUES>                                59,359                 104,151
<CGS>                                           27,009                  47,450
<TOTAL-COSTS>                                   38,130                  67,278
<OTHER-EXPENSES>                                16,576                  30,477
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                               (220)                   (404)
<INCOME-PRETAX>                                  4,873                   6,800
<INCOME-TAX>                                     1,900                   2,652
<INCOME-CONTINUING>                              2,973                   4,148
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                     2,973                   4,148
<EPS-PRIMARY>                                      .31<F1>                     .44<F1>
<EPS-DILUTED>                                      .28<F1>                     .40<F1>
<FN>
<F1>THE COMPANY HAD A THREE-FOR-TWO STOCK SPLIT EFFECTIVE JUNE 30, 1998. THE
EFFECTS OF THIS STOCK SPLIT ARE INCLUDED IN THE BALANCE SHEET AT JUNE 27, 1998
AND IN THE CALCULATION OF EARNINGS PER SHARE FOR THE THREE MONTHS ENDED JUNE
27, 1998 AND THE SIX MONTHS ENDED JUNE 27, 1998. PRIOR FINANCIAL DATA SCHEDULES
HAVE NOT BEEN RESTATED FOR THE EFFECTS OF THIS STOCK SPLIT.
</FN>
        

</TABLE>