Allow the glue gun to heat up according to manufacturer's directions.
While the glue gun is heating, remove the roses from their stems. To do this, clip the stems just 1/4" from the base of the rose with your wire cutters.
Before you begin with the flowers, you need to make a handle. Do this by measuring you desired length (times 2) and add an additional 3-inches for the knot. Fold the ribbon in half and tie the two ends into a double knot. Press a greenery or T-pin through the knot and into the foam ball.
To attach the roses to the Styrofoam ball, poke a hole in the foam with the stem or a toothpick, fill with the hot glue, then press the rose stem into the hole.
Continue adding roses, while mixing in the greenery and small white flowers, until you have completely covered the Styrofoam ball. Allow to dry completely.