Frequently Asked Questions

Everything you need to know about your next favorite pair of shades.

How do I know if the frames will fit my face shape?

We provide detailed measurements for every frame on our product pages. As a general rule, angular frames suit round faces, while rounded frames complement square face shapes.

Do SIN Eyewear sunglasses offer UV protection?

Yes, all our sunglasses provide 100% UVA and UVB protection, ensuring your eyes stay safe while looking stylish in the sun.

What is your return policy for change of mind?

We offer a 30-day return window for all unworn items in their original packaging. Simply contact our support team to initiate a return or exchange.

How long does shipping usually take?

Orders are typically processed within 24 hours. Domestic shipping takes 3-5 business days, while international shipping can take up to 10-14 business days depending on the destination.

Which payment methods do you accept?

We accept all major credit cards (Visa, Mastercard, AMEX), PayPal, and buy-now-pay-later options like Afterpay and Klarna.

Are your lenses polarized?

Many of our styles feature high-quality polarized lenses to reduce glare. You can find specific lens details under the 'Specifications' tab on each product page.