This group is the most difficult to categorize. Women who fall into this category choose their clothes for their simplicity, classic style and modesty. They seek to express their religious convictions through what they wear. Skirts and jumpers are popular, but trousers for women tend to be perfectly acceptable. Least likely of my religiously observant dress designations to choose to cover. Women in this group are most likely to have shorter hair styles, as shorter can be simple and easy to care for. Makeup is often avoided as a statement on simplicity, but jewelry is common, particularly earrings. Actual plainness (solid colors, simple print, limited-palette wardrobes) is a hallmark of the plain modern look. There are neither anachronisms nor symbolically or traditionally important items.
Some plain modern resources:
AND so, ye that know the Life and Power, and Light of Christ, which was before Death and Darkness, and the Power of the same wa, Be Faithful, who are gathered together in this Life and Power, and are Met in it, in it keep your Meetings . . . in which ye may all feel one another in the Fellowship and Unity, that is Everlasting, and never hath End.
And so, in that the Lord God Almighty preserve you all to his Glory; that . . . ye may be a Blessing in your Generation, and a good Savour to God, and in the ...
I am not Amish or Mennonite, but some people who come to my website are interested in knowing more about these groups. I can recommend these books as authoritative and relatively inexpensive sources of further information.