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Detail of the Black MK3 ring
Detail of the Black MK3 ring
A person wearing the MK3 Ring on their ring finger while sitting on a black leather sofa
Project of the MK3 ring with a hand that draws, eraser and sharpener.
Gift box with a Certificate of Authenticity and a drawstring pouch made of organic cotton
MK3 ring sizes guide


Urban Olive Design
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Squared. Contemporary. Essential. An unconventional addition to your ring collection.

Inspired by the MK3 building in Berlin, the MK3 RING is a cement ring designed with comfort in mind. Linear and geometric, its squared shape is innovative and original yet minimalist.

So light, you’ll forget you put it on. So architectural, you’ll feel an instant urban vibe.

The MK3 BLACK CONCRETE RING will be shipped in its own gift box with a Certificate of Authenticity and a complimentary drawstring pouch made of organic cotton – the perfect companion for travelling with or storing your wearable sculpture.

We strive to make our packaging material as sustainable as possible. Our packaging is designed to minimise waste, and its components are reusable or recyclable.


  • Designed in Berlin, Germany
  • Handmade and original
  • Strong and water-resistant
  • Lightweight for maximum comfort
  • Unisex
  • Made of cement and organic resin
  • Black (also available in Grey)
  • Care instructions: clean with soap and water


  • Small: 16x16 mm (internal measurement) - Weight: 2.5 gr
  • Medium: 17x17 mm (internal measurement) -  Weight: 2.7 gr
  • Large: 18x18 mm (internal measurement) - Weight: 2.8 gr
  • Extra Large: 19x19 mm (internal measurement) - Weight: 3.3 gr

    Pro Tip:

    To insert and remove a squared ring effortlessly, remember that the diagonal diameter will be longer than the length of the sides. So, when putting on the ring, turn it slightly on your finger so you can benefit from additional diameter width and slide it on effortlessly over the knuckle. When the ring is in place, you can then turn it a few times to find the best-fitted position.

    Each piece is unique. The artistic look of the creation is achieved through a particular hand-crafting process. Any imperfections are to be considered a feature, not a flaw.

    If you have questions about this artwork or feel unsure about finding the right size for you, please email us at