I personally believe this issue is in practice a particularly pathetic problem in the witness of evangelical and Reformed Christians, churches, and Christian institutions today (not excluding many sports teams). It is nearly taboo to even broach the topic. One pastor whose church has published concerns on modesty in apparel with Christians today said to me once that he believed his church would not likely ever grow much beyond its small numbers because of its leadership on this important issue (and a very worldly take on it by most of today's Church). Such things were not always so.
Considering the context of this site, I think it's important to review what the Westminster Larger Catechism states on the seventh commandment:
WLC 138: "What are the duties required in the seventh commandment?" Included among a host of other things is "modesty in apparel," with this Scripture reference: 1 Tim. 2:9:
In like manner also, that women adorn themselves in modest apparel, with shamefacedness and sobriety; not with broided hair, or gold, or pearls, or costly array;
Of course how modesty is described in this verse above may more closely touch on another very touchy issue in too much of the Evangelical and Reformed world today and not as directly on too little cover but too much and too gaudy and vain. However, what should not be ignored is the important topic of modesty in wearing too little and exposing too much, which also is further addressed next (note that the idea of modesty and some kind of connection to apparel/clothing is indeed directly made in the Scriptures).
WLC 139: "
What are the sins forbidden in the seventh commandment?" Included among a host of other things is "immodest apparel." Here, the Scripture references given are Prov. 7:10, 13:
And, behold, there met him a woman with the attire of an harlot, and subtil of heart ... So she caught him, and kissed him, and with an impudent face said unto him, [Emphasis added: one does not need to think hard about what this allusion might likely look like in entierety of a professional costume and very often includes what is being referred to in the opening question of this thread.]
For anyone interested to consider the topic further, here are resources linked to from our website on this category under the subheading, "Purity and Chastity in Sexual Behavior" (from this page:
https://puritanchurch.com/about/doctrine-and-practice/practice-what-duty-god-requires-of-us/):
We "republished" Mrs. Hemphill's (wife of an RPCNA pastor) article listed above. Here is an excerpt from that article in which she wrote:
At the risk of the reader’s knee-jerk reaction mentioned above, or a response of, “oh, please, that was a different age”, let me quote John Bunyan’s words:
Why are they for going with their … naked shoulders, and paps hanging out like a cow’s bag? Why are they for painting their faces, for stretching out their neck, and for putting of themselves unto all the formalities which proud fancy leads them to? Is it because they would honor God? Because they would adorn the gospel? Because they would beautify religion, and make sinners to fall in love with their own salvation? No, no, it is rather to please their lusts … I believe also that Satan has drawn more into the sin of uncleanness by the spangling show of fine clothes, than he could possibly have drawn unto it without them. I wonder what it was that of old was called the attire of a harlot: certainly it could not be more bewitching and tempting than are the garments of many professors this day. [I believe professors here means professing Christians.] [Emphasis added for direct reference to what was being asked in the opening of this thread; frankly, the cows bag comment is particularly a problem and nearly an epidemic in Reformed churches and homes, including too many led by pastors and elders.]