Both are OK.
Dragon and Phoenix bracelets are indispensable in Chinese weddings. According to Chinese tradition, the parents of both parties will give the bride a pair of dragon and phoenix bracelets, which means that the couple's dragon and phoenix are auspicious (the Cantonese homophone is "long-lasting love"), and love is stronger than gold. As the name suggests, the dragon and phoenix bracelet is a gold bracelet engraved with lifelike dragon and phoenix patterns. It can be a pair of dragon and phoenix bracelets, each engraved with a dragon or phoenix pattern, which means "in pairs", or it can be a bracelet engraved with a dragon or phoenix pattern. The pattern of "dragon and phoenix playing with pearls".
I personally recommend buying one because it is more convenient to wear on a daily basis. If it is only for important occasions such as weddings, two will look more valuable.