A wedding toss bouquet is basically a smaller, less expensive version of the bride's bouquet. The idea is that it can be tossed to a guest, but the bride still has hers as a keepsake. Less decoration, fewer flowers, shorter stems and less shaping are usually the norm for a tossing bouquet, as opposed to what may be an ornate or trailing group of flowers in the bridal bouquet.
Decide how large you want the toss bouquet to be. Consider mimicking the bridal bouquet in color and flower choice. For instance, if there are a dozen roses in the bridal bouquet, put three or four in the toss bouquet. Pull out some possible flowers and sketch or test your arrangement before beginning.
Choose flowers that coordinate with the wedding colors. These are usually the same as in the bridal bouquet, or complementary colors. Another option is to coordinate them with the reception table arrangement flowers.
Arrange the bouquet. Start with your main flowers, and fix their arrangement together with green floral tape wound down to the end of the stems and back up. One popular structure is three or five main flowers arranged in a loose diamond or triangle shape. Bind the stems loosely enough to be able to tuck in accents and greenery stems. Odd numbers of flowers are more attractive to the eye.
Add smaller accent flowers like stephanotis, baby's breath or rosebuds in the secondary color or a contrasting color. Pair each main flower with two or three accents. Greenery should be added the same way, sliding fern, ivy or leaf stems in among the flower stems, and binding the bouquet with green floral tape to create an easily held bunch.
Wrap the taped stems in a wide ribbon, leaving some to trail and curl. This is an element in nearly every tossing bouquet, for both its practicality and attractiveness. Accent it by wrapping narrower ribbon over the wide one, and cutting them long to give a pretty flying effect. If the ribbons you use fray, run a line of craft glue or hot glue over the ends and let dry.