Our Mood Two Tone Coastal Blues Mixed Stud Earrings - Pack Of 5 feature a classic mix of stones in tonal blues. These earrings are a must-have accessory for your jewellery box this season. Fastening: Post and Bullet Back. Width Dimension: Left ER: 4mm / Left Middle ER: 6mm / Middle ER: 6mm / Right Middle ER: 6mm / Right ER: 6mm. Drop Dimension: Left ER: 7mm / Left Middle ER: 6mm / Middle ER: 7mm / Right Middle ER: 7mm / Right ER: 7mm.