"Metallic studs" refers to small, usually round-shaped objects made of metal that are used to decorate or reinforce something, like clothing, shoes, or furniture. Full definition
A gorgeous leather (or faux leather) clutch with metallic studs... tough and pretty. (alreadypretty.com)
They have synthetic uppers with decorative metallic stud detail, cushioned leather covered footbed and a lightweight, flexible sole. (kelkoo.co.uk)
Jenny Tsang is wearing a black maxi dress with a deep thigh slash and spaghetti strap detailing, heeled bootie sandals, and a boxy purse with metallic studding on the strap. (justthedesign.com)