Lay the blazer out on a flat surface, such as a bed or the floor. Smooth out any wrinkles in the body and arms. Line up the buttons with the buttonholes, but don't button them.
Fold the sleeves into the body, as shown, smoothing out any wrinkles.
Roll the blazer up from the bottom. Don't force it into a small roll; it should be loose enough to avoid wrinkles.
Roll the blazer all the way to the collar. Place the jacket in your suitcase. When you arrive at your destination, hang up your wrinkle-free blazer.