How can I change the shape of my nose, specifically my nostrils? (Photos)

Hello actually your shape of the nose looks good but if you want make a smaller nostrils you can have a Rhinoplasty surgery.

It is certainly possible to change the more vertical position and shape of your nostrils to be smaller and  reduce the amount of nostril show that is visible on the side views of your nose. Some refinement of the tip including tip elevation can be achieved with little or no narrowing of the tip of your nose. I would recommend that you see a board certified facial plastic surgeon in your area.

Most noses on people of color lack architecture. The shape of the nose is the shape of the architecture which is cartilage and bone. As you are add projection to the tip of the nose there is an actual pulling of the nostrils inward. Also the illusion of more tip and bridge height give the appearance of thinner nostrils. If you want more narrowing than that, then you have to reduce the sill or allar nostrils.