This group is the most difficult to categorize. Women who fall into this category choose their clothes for their simplicity, classic style and ease of wear. While they still seek to express their religious convictions through what they wear, they also are much more likely to choose to blend in with the dominant fashion styles. Skirts and jumpers are popular, and 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 and there are no traditionally important items.
Some plain modern resources:
(An Exhortation to set up Women's Meetings) AND so, that none may stand idle out of the Vineyard, and out of the Service, and out of their Duty; for such will Talk and Tattle, and Judge with Evil Thoughts, of what they in the Vineyard say and do: And therefore the Power of the Lord God calls in all, into their Duty, into their service, in their Place, in Vertue and Righteousness, and into the Wisdom and Power of God. . . . Therefore train up your young Women to know their Duty in ...
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.