about the

21-12 is a contemporary jewellery label based in Antwerp, Belgium. We try to find a balance between the ancient craftsmanship of goldsmithing and innovative techniques and materials. This results in a progressive collection of sustainable elegant jewellery.

about the

Jewellery designer Tine Sibbens first discovered the techniques of goldsmithing in 2007 at the Royal Academy of Fine Arts in Antwerp. She further developed these skills at the Academy of Fine Arts in Sint-Niklaas where she graduated in 2014. She combined this extensive education with several technical courses where she discovered the use of innovative materials.

we are

We use precious metal and vegetal tanned leather of the highest quality and combine these natural materials with innovative new ones, such as advanced plastics. The quality of the materials is very important for us and therefore we use only the best materials.

we are unique.

Quality Label

By using only the highest quality of precious metals, natural leather and other sustainable materials, we can guarantee the top quality of all our jewellery.


All jewellery is designed and handmade in our studio by Tine Sibbens herself. This allows us to not only create unique and personal jewellery but also to customize them to your desire.


Every piece of jewellery from our collection can be tailormade. Together, we can create a personal and unique piece of jewellery completely in line with your dreams and desires.

Website by Desina.