One piece of jewelry people see Princess Sofia wearing regularly is her Project Playground "piece" bracelet. The bracelet is a thin piece of strong bright green yarn with a silver puzzle piece.
Project Playground was founded by the then Sofia Hellqvist and her friend Frida Vesterberg in 2010 to improve the life opportunities of children and young people. It first began operation in South Africa but has since began working in Sweden with refugee children fleeing the war torn Middle East.
You can purchase your own Project Playground bracelet at this link. They ship to the United States, Germany, and the United Kingdom.
During an event in November 2015 for Project Playground Sarah found that Princess Sofia wore a Saint Tropez top in a nude/beige color, which you can see below.