The size of your skin's pores mainly depends on your skin type. With large pores and comedones, you often have oily or combination skin.
Problems with large pores can be caused by hormonal factors such as menopause or puberty. Men often have larger pores due to higher testosterone levels than women. Pores can feel larger when they are filled with dirt and sebum, which turns dark when it oxidizes.
If you have large pores, you should choose skin care products that suit your skin type and that contain ingredients that regulate sebum production.