Shoppers are shrinking fast, and apparel companies are paying the bill for every size that no longer fits.
Apparel retailers are facing a costly surge in returns, and the culprit is the boom in GLP-1 weight-loss drugs. Customers are ordering multiple sizes, sizing down through exchanges, and sending back everything that no longer fits. One online suit retailer has seen returns jump 50% in a single year.
Picture this: a customer orders the same suit in three different sizes, keeps the smallest one, and ships the rest back. A month later, even that one is too big. Now multiply that shopper by millions, and you have the logistics headache currently keeping America’s apparel executives up at night.
What Happened
According to a report from The Wall Street Journal, retailers across the US are wrestling with a wave of returns driven by customers slimming down on weight-loss medications. Farnam Elyasof, founder of online budget suit retailer FlexSuits, says returns are up 50% in the past year. When someone orders the same suit in two or three sizes, he treats it as a warning sign, checks measurements, and sometimes advises the customer to wait until closer to their event before buying. The returns keep coming anyway, and he calls it a real loss for his business.
The pattern shows up in the data, too. Narvar, a company that manages returns for retailers, reviewed 38 of them and found that the share of apparel exchanges where shoppers sized down has climbed for three consecutive calendar years, peaking at 14.6% in 2025.
The Backstory
Returns have always been one of retail’s biggest profit-killers, especially online. Every item sent back racks up shipping, labor, and warehousing costs, and garments that come back out of season often get resold at a discount.
Prashant Agrawal, CEO of inventory analytics firm Impact Analytics, puts a number on the pain: for a $1 billion company that normally sees about 20% of purchased items returned, a 5 to 10 percentage point jump in returns can wipe out $20 million in gross margin.
GLP-1 medications supercharged this old problem. At peak weight loss, users can drop a full clothing size every month. Jeans, bras, and athleisure go first, then tops and dresses, then rings, bracelets, and even shoes. The effect is strongest in bigger sizes: Impact Analytics found returns jumped the most for medium, large, and extra-large items. Giants like Levi Strauss, Costco, and Walmart are all working to understand the shift.
Take Lisa Primm, a 57-year-old retired social worker from Ypsilanti, Michigan. After roughly two years on Zepbound, she is down 115 pounds and went from a size 22 to a size 4. For a stretch, she dropped a clothing size every few weeks. She still orders mediums out of habit, then returns them for something smaller.
The Plan
With GLP-1s becoming even more accessible thanks to price cuts and a new pill format, retailers are moving from confusion to countermeasures.
Judith Somekh, co-founder of The Dress Outlet, is pushing customers to study size charts before ordering. To keep her roughly 20% return rate from creeping up, the company charges a restocking fee that it recently doubled to 20% of the purchase price, with higher fees on select designer gowns. Her logic is blunt: higher returns mean higher costs, and higher costs eventually land on the consumer.
Audrey Herring, founder of women’s brand June Adel, kept her return rate steady at around 12%, but the reason behind returns flipped. A year ago, 30% to 40% of returns mentioned fit or weight loss; now at least 60% cite an item being too big. So she adapted the operation itself: ordering more small sizes, writing more detailed sizing descriptions, and flagging upfront when a garment runs oversized.
The Business Model Angle
This story is a masterclass in how an external shock can quietly attack a business model’s cost structure. A few patterns worth stealing:
1. Watch your unit economics, not just your revenue. June Adel’s topline return rate looked stable at 12%, but the cause shifted completely. Founders who only track the headline metric miss the structural change happening underneath. The membership-driven efficiency machine we break down in our Costco business model analysis is built on exactly this kind of obsessive cost discipline.
2. Price the behavior you want to discourage. The Dress Outlet’s restocking fee is a classic incentive redesign. Instead of absorbing the cost of bracketing (buying multiple sizes to try at home), it transfers part of that cost back to the shopper, nudging them to research before buying.
3. Turn signals into operations. FlexSuits treats a multi-size order as a red flag and intervenes before the sale. June Adel rebalanced inventory toward smaller sizes. Both converted a returns problem into an early-warning system and a merchandising input.
4. Demand shocks reshape inventory, not just marketing. When your customer’s body changes monthly, your size curve, product descriptions, and replenishment cycles all become strategic levers.
The Risk
The honest counterpoint: every defense has a cost. Restocking fees reduce returns, but they also create friction that can push shoppers toward competitors with generous policies. Free, easy returns became an e-commerce standard precisely because they drive conversion.
There is also a forecasting trap. Retailers loading up on smaller sizes are betting that GLP-1 adoption keeps growing and that users keep the weight off. If adoption slows, or customers cycle off the medication, that rebalanced inventory could become the next markdown problem. And for any retailer whose core customer historically shopped in larger sizes, the entire assortment strategy is now a moving target.
Quick Questions
Why are GLP-1 drugs causing more clothing returns?
People losing weight quickly order multiple sizes to find what fits, then return the rest. Many also exchange larger sizes for smaller ones as the pounds come off. Narvar found size-down exchanges hit 14.6% of apparel exchanges in 2025.
How much do returns actually cost retailers?
A lot. For a $1 billion retailer with a typical 20% return rate, a 5 to 10 point increase in returns can erase about $20 million in gross margin, according to Impact Analytics.
Which clothing items get replaced first during weight loss?
Jeans, bras, and athleisure usually go first, followed by tops and dresses. Eventually, even rings, bracelets, and shoes need resizing.
What are retailers doing about it?
Tactics include restocking fees (The Dress Outlet doubled hers to 20%), more detailed size guides, stocking more small sizes, and flagging suspicious multi-size orders before shipping.
The Bottom Line
For founders and operators, the lesson is that your business model is never just under attack from competitors. Sometimes it is a pharmaceutical breakthrough quietly rewriting your customers’ measurements. The winners here are not the retailers complaining about returns; they are the ones treating return data as free market research and adjusting inventory, pricing, and communication in real time. When the world changes your customer, change your operation before the margin erosion changes it for you.
