Frequently Asked Questions
Everything you need to know about your next favorite pair of shades.
How do I know if the sunglasses will fit my face shape?
We provide detailed measurements (lens width, bridge width, and temple length) for every frame on our product pages. Generally, rounded frames suit square faces, while rectangular frames complement rounder face shapes.
Do SIN Eyewear lenses provide UV protection?
Absolutely. All our sunglasses feature high-quality lenses that offer 100% UVA and UVB protection to keep your eyes safe while looking stylish.
What is your return policy for change of mind?
We want you to love your look. If you aren't satisfied, you can return your unworn sunglasses in their original packaging within 30 days of purchase for a full refund or exchange.
How long does shipping take?
Standard shipping typically takes 3-5 business days, while express options are available for delivery within 1-2 business days. You will receive a tracking number as soon as your order leaves our warehouse.
What payment methods do you accept?
We accept all major credit cards (Visa, Mastercard, American Express), PayPal, and buy-now-pay-later options like Afterpay and Klarna.
How should I clean and care for my eyewear?
To maintain clarity, always use the microfiber cleaning cloth provided with your purchase. Avoid using paper towels or household detergents, and store your sunglasses in their protective case when not in use.