A Surprise x4 Box

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Save up to 81%

(Valued up to )

Select Your Size:

100 people have this in their bag.

Final Sale. No Exchanges or Returns.

Shop Other Boxes:

A Surprise x3 Box

Sweater Weather Box

Denim Starter Box

Luxe Fall Symphony Box

Autumn Allure Box

Email: fit@universalstandard.net

Size Guide

Universal Standard Sizing	Universal Standard Denim Sizing	Your size in other brands	Waist	Hip	Bust

4XS	00	XS	24"	34"	32"
4XS	0	XS	25"	35"	33"
3XS	2	S	26"	36"	34"
3XS	4	S	27"	37"	35"
2XS	6	M	28"	38"	36"
2XS	8	M	29"	39"	37"
XS	10	L	30.5"	40.5"	39"
XS	12	L	32.5"	42.5"	41"
S	14	XL/1X	35"	45"	43"
S	16	XL/1X	37.5"	47.5"	45"
M	18	2X	40"	50"	47"
M	20	2X	42"	52"	49"
L	22	3X	44"	54"	51"
L	24	3X	46"	56"	53"
XL	26	4X	48"	58"	55"
XL	28	4X	51"	60"	58"
2XL	30	5X	53"	63"	60"
2XL	32	5X	56"	66"	63"
3XL	34	6X	59"	69"	66"
3XL	36	6X	63"	73"	69"
4XL	38	7X	66"	76"	72"
4XL	40	7X	70"	80"	75"

Already know your denim size? Match it to your waist measurement to find your size with US. If you’re between sizes, size up.

Please note, all measurements are in inches. Exact measurements may vary with each style.

Measuring Instructions and Fit Details

How To Measure?

Bust

Measure around chest at fullest.

Waist

Measure around the narrowest part of your natural waist.

Hip

Measure around the fullest part of your butt.

How It Fits

Skimming: Designed for a comfortable fit that lays closer to the body without clinging.

Boxes Selling Fast

(Valued up to )

How It Works

Pick Your Box

Choose from limited
edition Mystery Boxes.
Starting at just $88
(but valued up to $952)!

We’ll Get to Work

We’ll pack your box with our
pick of best-sellers & never
-before-seen exclusives we know you’ll love.

Unbox the mystery

The highly-anticipated moment.
Open up your box & enjoy your
new favorite pieces! Don’t forget to snap a pic for US!

What Our Customers Say

Is there anywhere that I can learn more about Mystery Box and the fine print?

Of course, we’ve got all the information you need in our Help Center. You can find all things Universal Standard by navigating to the Help Center via the website footer.

Plus full terms and conditions to satisfy your curiosity! You can review them at https://www.universalstandard.com/pages/mb2025-terms. We wouldn’t want the suspense to be too much, here’s a quick summary of the terms for you.

Offer is valid until August 24, 2025 at 11:59 pm PT, or while supplies last, whichever is sooner. Please allow up to 4 weeks for shipping. Mystery Boxes are FINAL SALE and not eligible for return, size/color exchanges or Fit Liberty exchanges. Full terms and conditions apply.

Are Mystery Boxes final sale?

Because Mystery Box is such a unique offering and a customer favorite (at an amazing value!), we’re not able to accommodate any returns or exchanges. All Mystery Box purchases are final sale. Trust US with your box!

What’s in each Mystery Box?

We can’t spill all the secrets- but here’s what we can say! Each Mystery Box is curated around a fun theme and comes with subtle hints to help you pick the perfect one (or more!). While the contents are a surprise, you might unbox: fan- favorite styles, never-before-launched exclusives styles, or your new fall staples!

It’s a mystery, but one thing’s for sure- you can’t go wrong!

What happens after I place my order?

Great question! As soon as your order is in our system, our small but mighty team will spring into action. We’ll conduct all the necessary checks before packing your items up with care. Our packing pros (human, but still pretty speedy) will do everything they can to get your order out quickly. That said, delays do happen from time to time. Our shipping carriers may also experience delays in scanning labels due to volume, so we appreciate your patience as they work to get your items to you.

Any questions?
We got you.