Katherine Dewar : Design
The design - which has a crown poised above the Union Jack alongside columns of diamonds - will appear on everything from posters to commemorative tea cups.
Katherine said she was "really excited" that her design was being used.
"It was great to see my design turned from a drawing into a print that will be used on so many things.
"I'm looking forward to seeing people waving flags with my design on to celebrate the Queen's Diamond Jubilee," she said.