Excel - Choose Unique Rows (based on multiple columns)

Hi everyone!

I've got an Excel problem...in one worksheet, I have a listing of all possible products (each with a model and a width -- these are for an inventory of shoes).  One column is for the model and the next column is for width (there is also a column for the SKU, but this is irrelevant).

I have a second worksheet with a final tabulation of the inventory of each size, etc., but would like each combination (model with width) to be on the second worksheet once.

Example...

SKU                          STYLE        SIZE   WIDTH
873370009283      XPX761      11.0         W
873370009177      XPX761      11.0         M
873370009290      XPX761      11.5         W
873370009306      XPX761      12.0         W
873370009191      XPX761      12.0         M
873370009313      XPX761      13.0         W

The second worksheet should have... (because out of this list, these are the only two unique rows when only considering style and width).

STYLE      WIDTH
XPX761   W
XPX761   M

Any ideas on how this can be done using a formula (for when there are additional rows added to the 1st worksheet)??

Thanks!!!!