How to Find the Perfect Size

 Did you know that sizing is not universal across brands, even brands within the same country? We know this can be super confusing and thats why we created this size guide to help you find your perfect size!

Top Sizing:

For the most accurate results grab your favorite top and a measuring tape. 

Step 1: Lay your top on a flat surface trying to make it as even as possible. 

Step 2: Measure your top width on the most wide point of the bottom. (Note: This does not work with tops that tie because the width is adjustable)

Step 3: Measure the middle part of the top in a vertical direction. 

Step 4: Compare both of those numbers with the chart below. 

Measure your bikini for the perfect size

WIDTH 13 15 16 17
BUST HEIGHT 4.5 4.75 5.25 5.5


Bottoms Sizing:

For the most accurate results, grab your favorite bottoms and a measuring tape. 

Step 1: Lay your favorite bottoms on a flat surface and measure the widest part of the hips. 

Step 2: Compare that number with the sizing chart below

**NOTE: The measurements of the bikini tops and bottoms will be smaller than your actual physical hip measurement because swimwear does stretch.**

WIDTH 12 14 15 16


Don't have a favorite bikini?

Don't worry, you can take that measuring tape and measure yourself. 

Sustainable Hawaii Swimwear Size Guide

Step 1: Measure the widest part of your bust, this is your "bust measurement"

Step 2: Measure the smallest part of your midsection, this is your "waist measurement"

Step 3: Measure the widest part of your hips, this is your "hip measurement" 

Step 4: Compare these measurements with our size chart below to find your optimal size. If you are in between sizes, we recommend you sizing up as our sizing tends to run smaller than most mainland US brands. 

UNDERBUST 29-31 31-33 33-35 35-37
WAIST 25-27 27-29 29-31 31-33
HIPS 33-34.5 34.5-36 36-37.5 37.5-39


*If you are in between sizes and like more coverage or like your bikinis to fit more loose, select the Larger of the two sizes.

Have any questions about our sizing? Feel free to contact us at


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