One of the most important people in a wedding ceremony after the bride and the groom is the mother of bride. She remains center of everyone's attention throughout the ceremony and this is why her appearance matters a lot. This is the reason why most designers who make bridal dresses also cater for this important woman.
Usually, by the time a girl decides to marry, her mother is no longer a young woman. Mother of a bride is usually middle aged and it is very common for women of this age group to put on a few extra pounds. It may not be that the mother of the bride is a plus sized woman, but she is likely to be a full figured woman. It is not very difficult to find a dress for a full figured woman but you will have to be very selective when it comes to choosing the style and color. You should keep a few things in mind so that you do not make any mistakes because it may not be possible to find another dress later.
When selecting the color you should make sure that the color is sober. This does not mean that it should be white or black but it should suit her status and age. A red or pink dress would look nice but it should go with your personality.
The style should be selected sensibly. You should remember that this is a formal occasion and the dress should be selected accordingly. Going for something very trendy would not be such a good idea because following trends suit the younger generation. Wearing a traditional dress that makes you look decent and presentable would be a nice idea.