This easy corsage tutorial shows the traditional way to design a wired corsage. I have other tutorials that teaches how to use a newer method of gluing the flowers with floral adhesive.
Realize that you can use any flowers you desire and change the colors to match your own wedding palette. It is advisable to keep the flower heads smaller - using 40 cm roses are usually better than a large 60 cm rose.
Here are the materials I used for this demonstration: