Our name is a playful nod to the sourcing of vintage designer bags. “Sien” is inspired by “seen” or “spotted”, a subtle wink to the fact that every piece in our collection is handpicked by us, Nina and Elselien. It’s also a blend of who we are: Sien from Elselien, Nien from Nina.
Together, we’re lifelong treasure hunters with a shared passion for timeless design, quality craftsmanship, and fashion with a story. Our mission? To help you find the bag of your dreams, one that’s not only beautiful, but meaningful too.
We’re more than just business partners. Our journey began years ago, working side by side in leadership roles where trust, structure, and creativity came naturally. Elselien, with a background in education and team management, brings heart, clarity, and communication to everything we do. Nina, trained at Hotelschool The Hague, adds her strategic mindset, entrepreneurial spirit, and love for numbers and details. Where one begins, the other picks up, a perfect match.
At SienbyNien, we offer exclusive, sustainable designer handbags, handpicked with love and passion. Our carefully curated collection blends iconic style with a strong commitment to authenticity and mindful consumption.
We believe fashion shouldn’t just look beautiful, it should feel right.
Our vision is to become the go-to destination for vintage and second-hand designer bags, a space where quality, sustainability, and personal style come together.
We’re building a platform for fashion-conscious people who value craftsmanship, storytelling, and intentional buying. By connecting our community to authentic, unique pieces, we aim to inspire a more sustainable and stylish future.
With track & trace
We are here for you
100% Authenticity guaranteed