10g. According to Lao Fengxiang's information in official website, Lao Fengxiang's double happiness bracelet is 10g, and the price is 3,500 yuan. Lao Fengxiang is a century-old national brand and a famous jewelry brand in China. Shanghai Laofengxiang Co., Ltd. evolved from Laofengxiang Jewelry Store and was established in 1848. The originality of its trademark "Lao Fengxiang" also stems from the font size of Lao Fengxiang jewelry store.