She is Sunday is a brand created out of love and passion

Information from the website:

Who are the founders?

To duet mother-daughter: Karolina Miko, a creative designer, and Mariola Rutkowska, owner of Atelier Szycie na Miarę. We are not a corporation—we create a close community of women who love fashion, comfort, and beautiful details. Our designs are created in Warsaw's Powiśle, where we ensure the quality and unique style of each item.
OUR PHILOSOPHY

Sunday's girl is a dreamer and a traveler who celebrates free moments as if every day were Sunday. We are inspired by vacation moments, California sun, Italian coasts, the French Riviera, and the gentle vintage of the 70s. We create clothes that carry lightness, harmony, and a desire to explore the world.