Measure and cut 30 inches of 2-inch silver ribbon with scissors, then mark the center.
Make a large bow shape with 20 inches of 2-inch black ribbon by folding into two large loops. Then, make a smaller bow shape with the remaining 12 inches of 2-inch silver ribbon.
Place the large black bow on the center mark of the 30-inch silver ribbon and the small silver ribbon on top of the black bow. Use the 30-inch silver ribbon to tightly tie the black and silver bow together to create the corsage base.
Cut the stem from the black silk rose and secure the head of the rose to the center of the ribbon bows with hot glue; let cool. Tie corsage on the wrist with the trailing silver ribbon.