I'd say there are about 4 families in my sspx parish who are 95-100% modest all the time. And about 2 other families who are very close to conforming to true catholic modesty. The other 30~ families are somewhere in between pagan culture and true modesty. From my knowledge of other families I would say around 30-50% of families (not singles) wear skirts outside the home.
But the biggest issue is tops and blouses, I regularly see complete skin tight tops (in mass and out) that leave nothing to the imagination. No real catholic wants to know your bra size! I have seen in Mass women's underwear showing through their skin tight skirts!
Gross immodesty has been at every chapel I have been to, which ranges from cmri, SGG group, sspx, independent. The women are not doing anything, the priests are not doing anything. I doubt most traditional catholics even know basic modesty rules!
Priests should be directing their flock to heaven, not to years of purgatory for thousands of immodesty sins or worse. Parents should be enforcing their priests direction. Children and adults should be obeying them. And then their future children obey them.
How can you get to heaven when you are in sin all the time! By being immodest these women (and men) are committing sin from the time they put on their clothes and walk out the door.
The thing about modesty that is so stupid is that it is the easiest sin to not do! It is a physical act that requires very little effort, maybe a snide comment behind your back, which we wear as a badge of honor! Catholics are not modern pagans, why are we dressing like them!
My parents in law have shown dozens of traditional catholic families over the years the rules of the church for modesty (always nicely and gently). Guess how many started dressing modestly? Zero. I believe 2 or 3 men have worn a suit (or at least a tie) because of my example, and hopefully if any future children or wives they will dress them well. I can only lead by example, and if someone asks for any help regarding modesty I will give it and hopefully they change.
I remember a while back a random little girl around 10 came to my spouse and said, 'I always love your (handmade modest) dresses they are so beautiful'. She was wearing a dress half way up her thighs and her mother was mostly immodest too. We know the natural law as children, we know right from wrong, this little girl saw the beauty of modesty and femininity, Parents and Priests need to too.
I used to get angry and hung up when I would see Immodesty but now I have come to peace that by being a traditional catholic I will be surrounded by immodesty, even at church. But I see the few families that are modest and it gives me hope. Because the modest families have 10 children while the immodest ones have 5. Eventually the laity will become modest again, by process of elimination.
A quick guide of modesty rules and suggestions (maybe this will help anyone in need who is reading this, or please share it)
Women must wear skirts always outside the home. They should be 2 inches below the knee (minimum). In church out of respect for God they should be longer but not required. Skirts can not be tight or form fitting, or see-through this is a serious error many women make.
Tops and blouses are governed by the 2 finger rule, two fingers below the collarbone, two fingers on the side of the base of the neck, and in the back from the base of the neck. Tops cannot be form fitting and should be moderately loose around chest.
The sleeve length should be to the elbow, but B XV abrogated it temporarily to be at the middle of the bicep.
No bikini or one piece or 'mom' swim outfit, there is modest swimwear that has waterproof skirts and tops. Wearing a bikini most likely is a mortal sin.
Men in mass should wear a suit or a shirt and tie with sweater or vest. At a minimum Dress shirt and tie. Jeans are not appropriate at mass ever. Outside of the home a collared shirt (polo or dress shirt), some collarless shirts might be appropriate (like mandarin style).
T shirts are not outerwear unless at a sport or physical labor (and this should be discouraged). This goes for women too. Shorts, unless it is sweltering hot should not be worn by adult men. You need to dress your age. Men should not appear topless, unless you are a boxer there is never a reason not to wear a shirt.
Rules from Pius XII, Pius XI, Benedict XV and a variety of saints.
Show the world you are not of this world by the way you dress, your soul and those around you are at stake.
This is my rant, please reflect and pray that modesty will come back to the traditional Catholic movement.