Disclosure: This blog post is not sponsored by Universal Standard, but I did receive a free Mystery Box in exchange for showcasing the outfit on Instagram. If you use my link or coupon code in this post to make a purchase, I will receive a small commission on the sale at no additional cost to you. Thank you for supporting my work!

Universal Standard Mystery Boxes are back, and this is the FINAL TIME they’ll be offered! That’s right – the brand has said this is the final hurrah for the super popular Mystery Box sale. I’m sharing everything I know about the Universal Standard Mystery Box sale, based on their information and several years of buying multiple Mystery Boxes. Already know the deal and are only here for a discount?

Use code INFS-MBAUTHEMMIE10 at checkout for an additional 10% off Mystery Boxes.

Universal Standard Mystery Box Sale: Everything You Need to Know

Universal Standard is one of my favorite brands. I fell in love with them in 2015 when they first hit the scene and have purchased so much since then. They are absolutely the most size-inclusive major brand with every item offered in sizes 00-40. As someone who is very often excluded from styles as a size 28, it is extremely appreciated. The styles are classic and high quality and some of my favorite things in my closet. There isn’t a week that goes by that I don’t wear US at least twice. If you want more photos, you can find my Universal Standard archives here.

What is the Universal Standard Mystery Box?

Universal Standard’s annual mystery box sale is one of the most anticipated shopping events of the year. For a limited time, you can purchase a mystery box filled with 2-3 surprise items from the brand, all at a discounted price. But what’s inside the box? And is it worth the risk?

Just like it sounds, a Universal Standard Mystery Box is a package you purchase where the items are a mystery. For a limited time, you can purchase a themed box at deep savings not available from Universal Standard at any other time. You give up control, and they give you a discount. The fall 2023 Mystery Boxes begin 9/21 and will go through 10/1, unless they sell out earlier. There are 13 themed boxes you can select from, including Autumn In Paris, Nights in Aspen, Denim Discovery, and more. Some additional specialized boxes will be released throughout the sale, so check back to see if there’s something new that catches your eye.

All boxes come in sizes 00-40 and come with 2-3 wardrobe essentials that fit the box’s theme. Prices start at just $98 and select boxes are valued up to $1,144. That’s up to a 90% savings.

Boxes DO sell out throughout the sale, so if you want to get a specific box, I suggest shopping early. (Learn from my mistake of missing out on the Luxe box last year!)

Things to know BEFORE buying a Universal Standard Mystery Box:

• All sales are final. There are no returns or exchanges with any of these items. If you’re OK with that risk, go forth and purchase! If you have experience with selling online, US items typically sell quickly on Poshmark and in Buy/Sell/Trade Groups on Facebook.
• US sizes are DIFFERENT! Triple-check your size if you’re not familiar with it: I find their size charts to be extremely accurate, but their sizing scale is labeled differently from other brands. If you’re close to my size, I wear a size 28 in most retailers and do so as well for the numeric labeled items at US, and in their alphanumeric sizing, wear either an XL or 2XL depending on how I’d like the item to fit.
• It’s truly random what is selected for you. Items will fall in the theme of the box you purchase, but the specific items/colors could vary from person to person. If you’re ultra-selective or are only looking to fill a narrow gap in your wardrobe, this might not be the right sale for you. But again, if you’re comfortable selling online or with any other US-obsessed friends, then it should be easy to swap or sell what didn’t hit the mark for you.
• Boxes sell out – If there’s a specific one you’re interested in, I suggest buying early. Sizes and styles become limited.
• Shipping can be slow – between 3-4 weeks. If you are looking for Amazon Prime speeds, this isn’t it!
• View the 2023 Mystery Box FAQs here for more details.

What I received in my Major Style Mystery Box:

Universal Standard gifted me their Major Style Mystery Box in exchange for me sharing the contents on Instagram. This box includes 3 styles for $278. The value of this box could be up to $614. I ordered my usual US size, a 2XL, and they all fit perfectly. Reminder – your box will likely be different! I’m just sharing what I received as an example of the items you could get:

Derjon Trench Coat – retails at $228

Elbe Liquid Jersey Shirt Classic Fit – retails at $94

Aalato Liquid Jersey Polo Top – retails at $78

I was so excited to see the Derjon Trench in this Mystery Box. It’s such a classic wardrobe staple that can be worn forever. This one is water-resistant and has a lot of luxe details like interior fastening buttons, a hook closure at the collar, buttoned pockets, and more.

I already own some Universal Standard styles in their liquid jersey fabric, so I knew I’d like the two tops that were in this Mystery Box. The forest green of this full-placket button-down is so pretty. I paired it here with a Universal Standard satin skirt I got a few years ago, along with these killer wide calf boots.

The polo-style liquid jersey top is a newer style from US and I like the versatility. It can be dressed up or down, and the purple is rich and saturated. Here I have it with some Universal Standard Joni high-rise curve jeans and my favorite budget-friendly fashion sneakers.

Universal Standard Mystery Box discount code:

Have questions? Let me know and I’ll try to answer them! Also, let me know what boxes you’re getting!