Unique sterling silver 16g (1.3mm ) thick wire custom sized. The heart is approximately 10mm across to the out side edge. I custom make all of my jewellery in my tiny studio located in historic Fort Langley BC and I do my best to have consistent style but with the irregular nature of handmade sometimes there are some slight variations from the photos. I use solid sterling silver in my silver rings not plated and it will not wear off.