Frequently Asked Questions

Sienna Swim was founded by designer and owner Sienna Mae Gomez, whose passion for swimwear and honoring femininity in every form come together in her line!

For your convenience, we have listed all model measurements and sizes in the description of our suits for reference. Before you buy, we suggest reviewing our size chart and taking your measurements to ensure the best fit. Please note that we updated our size guide based on feedback from our first collection. If you are purchasing a collection one item, please refer to our old size chart.

In our research we found that size guides vary greatly across brands and that there is no “standard” sizing when it comes to women’s clothing.We updated our size guide from collection one to collection two based on feedback we heard from our customers and also based on fit sessions with women of all shapes and sizes who wanted a more representative fit up to 3XL. We appreciate this feedback and are always open to hear yours! Please contact us via email at contact@siennaswim.com

Yes, all of our styles are stocked in a full and inclusive size range from XS to 3XL. Please refer to our size chart

All of our collections are limited release, meaning you have to get them while they’re here! We may bring back your favorite styles, though, so make sure you’re signed up for our mailing list so you can be the first to know when new designs are dropping! We’ll also announce new drops via Instagram @SiennaSwim.

Sienna Swimwear uses the highest quality fabrics, which means you’ll have to take some extra care in wearing and washing your pieces. We recommend handwashing with a mild detergent in cold water and hang drying in the shade. In order to prevent pulling of fabric, please avoid contact with rough surfaces. To extend the life of your pieces, we recommend rinsing immediately after use, especially after using sunscreen and oils, as they can stain or damage the fabric.

If you received the incorrect item, please let our customer service team know by contacting customerservice@siennaswim.com. Please add your Name and Order # in an email and a member of our team will get back to you as soon as possible.  


We strive to get back to you within 24 business hours. 

Yes, we just launched our first ambassador program – our Sienna Swim Collective – in August 2022 with 30 women from around the world. We post our ambassadors frequently on our @SiennaSwim Instagram page and will announce updates to our program exclusively there. If you have a question about modeling for us and/or being considered for our Collective in 2023, please fill out this form and we will be in touch in early 2023.