A great pair of bracelets in the style of Siwa. Unlike the usual type of Siwa bracelet, this pair is not made of silver but of metal. I think it is likely that these bracelets were used as a prop accessory in a film or a theatrical production.  

Each bracelet measures 21 cm (8 1/4") inner circumference (closed). The diameter is 7 cm (2 5/8"). It is 8 cm wide (3 1/4") and together, the two bracelets weigh 274 grams.