You can't permanently shrink a pore — size is mostly genetics, oil flow and the slackening that comes with sun and age — but you can make pores look markedly smaller. Niacinamide moderates oil and refines their appearance, BHA keeps them from stretching with trapped debris, retinoids firm the pore wall, and daily sunscreen prevents the laxity that lets them sag open. We ranked these 10 Korean picks that lead on those actives, the leader being Anua Niacinamide 10% + TXA 4% Dark Spot Serum. Prices run $12–$33. Take the quiz to re-rank for your skin.










Not permanently — pore size is largely genetic. But you can reduce how large they look: niacinamide and BHA keep them clear and refined day to day, retinoids firm the surrounding skin over months, and sunscreen prevents the sun-driven laxity that makes pores sag wider.
Niacinamide (for oil and appearance) and BHA (to keep pores clear) have the most day-to-day evidence, with retinoids adding longer-term firming. Anua Niacinamide 10% + TXA 4% Dark Spot Serum is our current top pick because it leads on these.
Yes — UV breaks down the collagen that keeps pore walls taut, so unprotected sun exposure gradually makes pores look larger. Daily SPF is one of the few things shown to prevent that laxity, which is why we weight it here.
Rankings recompute from the catalog on every data update. Seed data pending weekly verification.