The Trim Studs, together with the rest of the studios Machinist collection, were inspired by shapes from architecture and machines. However, the resulting pieces and these beautiful, simple studs retain an identity all of their own. Available in sterling silverand gold plated finishes. Size: 4.5mm Care All of Matthew Calvingjewellery is made in solid Sterling Silver.Silver will eventually lose its lustre or shine. To keep your jewellery looking its best we recommend you store each item separately to avoid scratching or marking. Remove before applying makeup or skin or hair products. Remove before bathing or showering. Avoid contact with water and harsh chemicals. Clean occasionally by gently wiping with a clean, dry and soft cloth. Plated jewellery will eventually lose its colour. This depends on the PH of the skin, the type of jewellery and how often the piece is worn. Rings and bracelets have more continuous skin contact and will fade faster than earrings or pendants.