I was introduced to these a few years ago for wearing over pantyhose with pants, and was almost surprised to see them for sale still. Apparently they are becoming popular again with all ages (and often sold out).  Quite by accident, I found out that Velrose were much more narrow than advertised (this is not a bad thing).  I do really wish they were longer and in more colors, but for the fit, they are quite versatile, practical, and unique.
In fact you can wear them as an "invisible" base layer over tights/hose, and thus under almost anything. Compared to other brands, Velrose have a smaller ankle/fit, and so are simply ideal under skinny jeans, jeggings, or even leggings.  They are of smooth nylon (almost Antron III but not quite), so tight jeans just glide on over them, and will fit and move with you so much more comfortably during the day. The waistband isn't covered or tailored, which is a drawback, but the snip-it lace is a nice add-on. I did not need to use this, and I am not that tall, so yes I wish they were longer.  I also noticed that they seem larger for the stated size *than they used to be,* so you might want to order a size smaller.  The drawback is that the hems are NOT made of the finer crochet lace like Velrose used to be, and in my opinion the quality has gone down some.  They are not quite as slender/fitted, but they don't bunch up quite like other liners would, but instead hug your shape like a slip is supposed to. They help hide VPLs, seams and make just about anything look and fit better. They are good for all day, every day wear, and are light enough to wear year round.