It’s tempting for nervous brides and bridesmaids to hide behind their bridal bouquets by carrying them too high up their body. This makes arms appear shorter and obstructs detail on the body of the dress.
The main advice to remember is to hold bouquets below the waist, this way they don’t compete with faces and detail on the body of your dress. It also makes arms appear longer, leaner and more relaxed.
This is the general rule for full length photos, bouquets can be held higher for close up photos and a good photographer will advise for specific shots.