Linx Barrel Clasp Snake Chain bracelet extender in 925 sterling silver. 
Linx extenders are universal, meaning they are compatible with not only your favorite Linx bracelet, but also standard size charm bracelets of other brands as well. 
Bracelets extenders are the perfect solution for charm bracelets that fit a bit tight.
Extenders are available in both 3.5cm and 4cm. Multiples  may also be added as necessary.