I bought some pore strips for my brother a week ago for less than $4 (In the US) and tested it.
My brother washed his face. This is his nose before the strip and after cleansing.
I removed the strip from its container, twisted it around then placed it on my brother's face. You have to put it on (1)quickly on a (2) wet nose or else it won't work as well. That was my mistake.
This is his nose after, you can see some improvement. It would be better if his nose was wetter and I was quicker though.
This is the nose strip; you can see that it works. However, it pulled more hair than heads. I should correct that next try.