You will need to cut the pearl headed corsage pins shorter for use on boutonnieres. Always protect your eyes with safety glasses before cutting to avoid flying shards.
Pins coming in a variety of colors - don't feel limited to using just the white.
I bury the 2" pin in dry foam before cutting - it safely keeps the cut end of the pin buried in the foam rather than flying to the floor.
I cut these very short. I don't want the ends sticking out beyond the boutonniere stem.