Whose adorning let it not be that outward adorning....But let it be the hidden man of the heart, in that which is not corruptible, even the ornament of a meek and quiet spirit, which is in the sight of God of great price. 1 Peter 3:3, 4.
Is there anything wrong with washing your face? Is there anything wrong with combing your hair? How about wearing a watchband" Is it OK to wear a necktie? Should Christians wear clothes that are in style? Should they try to look nice? Are scarves or pins acceptable? What about lace, ribbons, or buttons? Is it wrong to dye your hair or wear a wig? Is it wrong to wear makeup? If a wristwatch is all right, then what about a pendant watch? Is there any difference between wearing a colored scarf and a small silver necklace? What about a wedding ring? Is all jewelry to be forbidden?
While there are differing standards in different parts of the country, different schools, different cultures, there are principles that are given in Scripture that apply everywhere. In Revelation 12 God uses a woman to represent His true church. Notice how she is dressed. "And there appeared a great wonder in heaven; a woman clothed with the sun, and the moon under her feet, and upon her head a crown of twelve stars" (verse 1).
Revelation 17:4 describes the false church, also represented by a woman--this time a harlot. Notice what she was wearing: "And the woman was arrayed in purple and scarlet coulour, and decked with gold and precious stones and pearls, having a golden cup in her hand full of abominations and filthiness of her fornication." Of course, these verses are symbolic. There might be people who don't believe in wearing anything at all who would find comfort in Revelation 12:1! But God has had something to say about nakedness in other places in Scripture. So obviously that isn't the point. The principle is the contrast between natural, simple attire, and extravagance.
What is the reason for these restrictions? Because the adorning of the outside is simply a symptom of an inward lack. God wants us to have the inward adorning of a meek and quiet spirit, not the outward adorning that draws attention to ourselves. The application of these principles will have to be made in the framework of our own personal communion with Him.