Each product has its own unique size guide located on the product page. We cannot guarantee at 100% that the size will work for you however we do have a 95% accuracy when using our size guides.
Please Note
Due to the nature of the materials we use, our sizes may not match your typical sizes. It is important to input the most accurate information. Our size chart is based on average sizes for height and weight. The Define Bands run small so the size given may not be the size you expect.
Still Not Sure?
If your weight is towards the end of the weight range, choose the next weight range up.
Use the size chart to find the best size based on your height and weight. It is important that you use your current body weight.
If you are still not sure if the size the product size guide is giving you is correct, please read the following articles for differing body types. 
Instructions for Putting On Your Define Band
Step 1
Wrap the band around your waist at the smallest part of your midsection, generally around your belly button area.
Bring the two ends together and ensure the zipper is connected properly before you start zipping.
Step 2
Once the band is around your belly button, connect the two sides and begin to pull the zipper up.
Pull the bottom of the band down after zipper is all the way up.
Step 3
Secure the velcro straps after zipping. Do not overly tighten straps.
The straps should be left undone and open, or removed, when doing abdominal exercises.
We have a 30 day exchange policy if you have sizing issues.
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What Waist Has Been Featured On
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United StatesPerfect Size-
Awesome- waist band arrived on time. I was unsure about the size. I am 143 pounds 5/2 height. Waist is 31 inches. Size chart stated a large would be best fit I was sure that can’t be right because I wear a small. I tried the Large as suggested and happy to say it fit. THEY RUN SMALL it fits perfectly excited to try it out.
What Waist
Thank you so much for your honest review. We are happy that you are enjoying the product:)
United StatesAwesome Results
Overall experience was great! This is my second what waist trainer and the results have been amazing. First one I ordered was a 3xl and about a year later and I had to order my second one which is now an XL
United StatesLove it!!
This was my first time ordering from what waist and I ordered based of the size given to me when I used the sizing tool. It is a perfect fit and is very comfortable to wear when exercising and doesn’t roll up and covers my fupa.
What Waist
Thank you so much for your honest review. We are happy that you are enjoying the product:)
Best waist trainer so far
My daughter got me this waist trainer for Mother’s Day and I love it. Spot on with the sizing too. For referance she purchase an XL and I’m 5ft even and 170lbs.
What Waist
Thank you so much for your honest review. We are happy that you are enjoying the product:)
United StatesLove! And worth $$
I absolutely love it I just received it in the mail today and I tried it on and it fits and feels perfect. I'm 5'0 and weigh 205 and the 2x was what I ordered. Can't wait to start my journey.
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