Frequently Asked Questions
Everything you need to know before your next beach getaway.
How do I find my perfect fit?
We recommend checking our comprehensive Size Guide which includes measurements for all styles. If you are between sizes, we generally suggest sizing up for the most comfortable fit.
What is your return policy?
We accept returns on all unworn, unwashed swimwear within 30 days of delivery. Please ensure all original tags and hygiene liners are intact to be eligible for a refund.
How should I care for my Sienna Swim pieces?
To maintain the quality of the fabric, we recommend hand washing in cold water with a mild detergent and laying flat to dry in the shade. Avoid rough surfaces and high heat.
How long does shipping take?
Standard shipping typically takes 3-7 business days within the domestic US. International shipping times vary by location, usually arriving within 10-15 business days.
Are your swimsuits sustainable?
Sienna Swim is committed to the planet. Many of our collections are crafted from recycled nylon and eco-friendly fabrics, and we use biodegradable packaging for all shipments.
Can I change my order after it has been placed?
We process orders quickly to ensure fast delivery. Please contact our support team within 1 hour of purchase if you need to make changes to your shipping address or items.