The hull numbers are thermally printed on clear waterslide decal paper. They are white with black shadow.  They are sized to fit GHQ models but will mostlikely fit other manufactures as well as Shapeways 1-2400 scale prints.  Unlike the BB & Cruiser sheets there are only 2x of each hull number for every WWII active Clemson & Wickes DD.  This includes those reasigned as Fast transports, Minesweepers, Sea Plane Tenders etc...
 
 
The decal picture is with a Fletcher DD for scale purposes.