Other materials needed:
A sea-glass bead or a button for the centre.
If you’re going down the sea glass bead route you’ll need to find a nice piece of sea glass at the beach, which you can wrap in 2.5 mm beading wire, which will hold it in place in the centre of the rose.
A safety pin for the back, which should measure less than 5 cm in length so that it remains invisible when the corsage is worn.