The bridesmaids usually carry flowers which are smaller than the bride's bouquet. The colour and style will generally compliment their dresses and the overall scheme of the wedding.
If the bridesmaids are very young they may damage flowers by over-handling, or grow tired of holding the posy. An alternative may be a small basket which is easier to handle. Other options could be a single flower with some foliage, or a wand with some decorative detail.
Bridesmaids may also wear floral headdresses or incorporate flowers into their hair style.