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Select Your Size:
34 people have this in their bag.
Final Sale. No Exchanges or Returns.
Shop Other Boxes:
Your Core Wardrobe Box
4 Piece Surprise Me Box
Your Denim Upgrade Box
The Ultimate Luxury Box
Universal Standard Starter Pieces Box
The Essential Top Edit Box
The Linen Getaway Box
Your Spring Reset Box
The Polished Professional Box
Your First-Class Style Box
Your Effortless European Style Box
Your Minimalist Elegance Box
The Perfect Button-Downs Box
The Cozy Cabin Escape Box
3 Piece Surprise Me Box
Your Work-Life Balance Box
Your Weekend Uniform Box
The Sleep Retreat Box
The Effortless Dress Edit Box
Wear Everywhere Tops Box
The House of Zen Box
A Touch of Class Box
Your All-Season Staples 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.
size guide model
How It Fits
Skimming: Designed for a comfortable fit that lays closer to the body without clinging.

Boxes Selling Fast

Woman wearing MB0226-YCW-S2-30-FINAL-SALE from Mystery Box
Your Core Wardrobe Box
$84 (Valued up to $212)
Woman wearing 4 Piece Surprise Me Box from Mystery Box
4 Piece Surprise Me Box
$178 (Valued up to $1,152)
(Valued up to )
(Valued up to )
Woman wearing MB0226-USP-S1-1-FINAL-SALE from Mystery Box
Universal Standard Starter Pieces Box
$174 (Valued up to $434)
(Valued up to )
(Valued up to )
Woman wearing MB0226-TLG-S1-10-FINAL-SALE from Mystery Box
The Linen Getaway Box
$244 (Valued up to $604)
(Valued up to )
(Valued up to )
Woman wearing MB0226-FCS-S2-1-FINAL-SALE from Mystery Box
Your First-Class Style Box
$162 (Valued up to $358)
(Valued up to )
(Valued up to )
Woman wearing The Perfect Button-Downs Box from Mystery Box
The Perfect Button-Downs Box
$248 (Valued up to $450)
(Valued up to )
Woman wearing MB0226-SUR3-S3-4XL from Mystery Box
3 Piece Surprise Me Box
$118 (Valued up to $424)
Woman wearing MB0226-WLB-S2-1-FINAL-SALE from Mystery Box
Work-Life Balance Box
$248 (Valued up to $620)
Woman wearing Your Weekend Uniform Box from Mystery Box
Your Weekend Uniform Box
$238 (Valued up to $594)
(Valued up to )
Woman wearing The Effortless Dress Edit Box from Mystery Box
The Effortless Dress Edit Box
$168 (Valued up to $594)
Woman wearing MB0226-WET-S2-1-FINAL-SALE from Mystery Box
Wear Everywhere Tops Box
$224 (Valued up to $452)
Woman wearing MB0226-HOZ-S1-1-FINAL-SALE from Mystery Box
The House of Zen Box
$174 (Valued up to $318)
Woman wearing MB0226-TOC-S3-1-FINAL-SALE from Mystery Box
A Touch of Class Box
$298 (Valued up to $592)
Woman wearing BU-MB0226-USS-S2-1-FINAL-SALE from Mystery Box
All-Season Staples Box
$118 (Valued up to $265)

Pick Your Box
Choose from limited
edition Mystery Boxes.
Starting at just $84
(but valued up to $1,284)!
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/mb2026 We wouldn’t want the suspense to be too much, here’s a quick summary of the terms for you.

Offer is valid until February 22, 2026 at 11:59 pm PT, or while supplies last, whichever is sooner. Mystery Boxes are FINAL SALE and not eligible for return, size/color exchanges or Fit Liberty exchanges. Please allow up to 4 weeks for shipping. Cannot be combined with other discounts and promotions. 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.