As I have three young daughters, I am constantly on the lookout for wise words on this topic; I have a God-given duty to fight the strong tides of this world on the subject.
The following quotation comes from Holly Stratton and is found here on the Sharper Iron website.
In spite of the challenges outlined in this article, a more important and poignant message is that the path of modesty is paved with the glorious Gospel of Christ. As the truth of His grace fills the heart of a Christian woman, she will develop a mind of sobriety that will find her setting “her affection on things above” (Col. 3:2). The more she is consumed with the fact that her nakedness has been covered with robes of righteousness, the more she will desire to physically clothe herself in a manner that will richly—and not skimpily—demonstrate that covering. As she grows in grace, she will begin to more fully understand that, as a redeemed child of God, her clothing represents more than a physical covering. She will develop a shamefaced attitude that comes from a heart that remains keenly aware that the shame of her sin was covered by the precious blood of her beloved Savior, a covering she was unable to procure for herself. A yearning to “conceal, not reveal” will grow within her heart as she gains deeper understanding of that marriage, a beautiful picture of the Gospel that has covered her sin, offering the one venue where her nakedness can be shamelessly exposed. This truth will drive her to joyfully preserve herself for a holy union she will cherish whether she is married or not.