These 9ct yellow gold stud earrings feature a 3mm Montana crystal and an Andralok fastening - so there's no need to worry about fiddly backs. Measuring 8mm from front to back, the pin is a narrow 1mm wide. At just 0.2 grams in weight you'll find them comfortable enough to wear all day long. Check out our full range of colourful studs to complete your collection.