If you opt for a ring or a bracelet, there are a few things you can try to make sure they fit like a glove. The Bulgari team advise checking your recipient’s existing pieces for size numbers, or secretly bringing them in-store for the experts to measure for you. If neither of those are possible, you can even try them on yourself at home to see how they fit for comparison. Alternatively, why not ask a friend, partner or family member who might know? When it comes to rings, remember to consider which finger they would want to wear it on: “observe how they wear their jewellery or try to slip the question into conversation discreetly.” Nevertheless, there’s no harm done if you do choose the wrong size, says De Beers. “It can always be exchanged in-store over a glass of Champagne, tea, or coffee, so you needn’t worry too much about getting the size perfectly right.”