I read that the size of our facial pores are determined by genetics! Experts say that we can't really change the size of pores but can make them look smaller by cleaning them regularly.
So skin products that claim to make our pores smaller don't really do that. They just prevent the pores from looking bigger due to stretching that all the dirt and oil causes.
This also means that there is no permanent way of getting smaller pores. It's kind of like exercise. If I exercise for one week, I can't expect to keep fit for the rest of my life. I have to keep exercising regularly to get results. That's why to make pores look smaller, we have to keep cleaning our face regularly.
If someone or something promises you forever small pores, don't believe it!