Very small, they do not fit well resulting in sound passing through, they do not block anything. I had an older model from Alpine that were inside a capsule (they look somewhat like the photo I'm uploading) which are larger and I have no complaints, but these specific ones are just a waste of money, all the sound passes through, look for something else in transparent

I used them at a concert that took place at one of the largest stadiums in Europe (San Siro), they really did an amazing job filtering the sound as I couldn't hear the crowd noise at all and I could hear the artist clearly. In a moment when I took them off to see the difference, it was something more than noticeable. Their application is amazing, within 5 minutes you forget that you're wearing them (follow the application instructions on the packaging and don't try to put them on like earplugs, it makes a huge difference). I highly recommend them.

For now, I wear them at work (construction), they cut off the 'bad' sound perfectly, for example, wheel, drill, etc.
I believe they will also do the job at parties.

Useless, they are really a waste of money, give 30 minutes and get those from 3m, which speak to you at one meter and you hear nothing...