Frequently Asked Questions
Everything you need to know before you dive in.
How do I know which size will fit me best?
We provide a comprehensive size guide on each product page. Our suits are designed with high-stretch Italian Lycra, but if you are between sizes, we generally recommend sizing up for the most comfortable fit.
What is your return policy for swimwear?
We accept returns within 30 days of delivery. For hygiene reasons, all items must be unworn, unwashed, and have the original hygiene liner and tags still attached.
How should I care for my Sienna Swim pieces?
To maintain the vibrant color and elasticity, we recommend hand washing your swimsuit in cold water with mild detergent immediately after use. Always air dry in the shade and avoid rough surfaces.
Do you offer international shipping?
Yes, we ship worldwide! International shipping rates and delivery times are calculated at checkout based on your location. Please note that customs duties may apply depending on your country.
Can I change or cancel my order after it has been placed?
We process orders quickly to ensure fast delivery. You can change or cancel your order within 1 hour of placement by contacting our support team via live chat or email.
Are your materials sustainable?
At Sienna Swim, we are committed to the planet. 80% of our collection is crafted using ECONYL®, a regenerated nylon fabric made from recycled fishing nets and ocean plastic waste.