I want to look modest and decent on my daughter’s wedding ceremony. So, what style of dress is best for me?

I want to look modest and decent on my daughter’s wedding ceremony. As the mother of the bride, I am really glad that my daughter finds her Mr. Right. She is going to hold a traditional wedding in a church. So, what style of dress is best for me? And like most of the middle age women, I am a little over size. Thanks a lot for your suggestions!