Making a poly mesh wreath starts with a wreath work form; 24-inch diameter is the standard size. Some wreath forms come with colored mesh that serves as the base or background color and can easily be tied or manipulated. From there, DIYers add more mesh in different colors, along with ribbons, bows, faux flowers, holiday decorations and whatever else comes to mind.
Unlike fresh or dried flowers and foliage, wreaths made of deco mesh can be used inside or outside and are fairly weather resistant, depending on the materials used. To avoid fading, don't expose them to direct sunlight -- that's pretty much the rule for any wreath.
Deco mesh wreaths, forms and books (Compare prices).