Cabbage White butterfly

They are similar to the Large white butterfly (Pieris brassicae) but smaller.

An excerpt from the article 12 facts about Cabbage White butterfly
Their wings are creamy white on the upperside and yellowish on wings' underside. Black spots appear on both fore and hind wings. Forewings upper corners may be dark grey. The butterfly's body is covered with dense hair, which is white in females and darker in males. They are being mistaken for moth because of their plain colors. The wingspan of small white is 32 to 47 mm (1.3–1.9 in).