- Apparel returns are surging as GLP-1 users rapidly lose weight, with one online retailer reporting a 50% increase in returns in the past year — a direct hit to gross margins that can cost a $1 billion retailer $20 million or more.
- The share of apparel exchanges where shoppers sized down hit a record 14.6% in 2025, up for three consecutive years, according to a review of 38 retailers by returns manager Narvar.
- Returns for medium, large, and extra-large items are rising the fastest, according to Impact Analytics, as GLP-1 users cycle through multiple sizes while their bodies change — sometimes dropping a full size every few weeks at peak weight loss.
- Retailers are responding with higher restocking fees (one doubling its fee to 20%), stricter size chart guidance, and smaller-size inventory increases — but the structural problem is growing as GLP-1s become cheaper and more accessible via pill form.
What Happened?
America’s apparel retailers are grappling with a new source of margin pressure: the mass adoption of GLP-1 weight-loss medications. At peak weight loss, users of drugs like Zepbound can drop a full clothing size every month, and they’re responding by ordering multiple sizes simultaneously and returning what doesn’t fit. Online budget suit retailer FlexSuits has seen a 50% increase in returns over the past year, with founder Farnam Elyasof flagging multi-size orders as a “red flag.” The problem is particularly acute in mid-range sizes: returns for medium, large, and XL items are rising fastest, per Impact Analytics, as GLP-1 users shop while uncertain about where their bodies will land.
Why It Matters?
Returns are among the most destructive forces in retail economics. Shipping, labor, and warehousing costs compound quickly, and out-of-season items returned after their selling window must be marked down. For a $1 billion apparel company with a typical 20% return rate, a 5-to-10 percentage point increase in returns can wipe $20 million off gross margins. The GLP-1 return wave isn’t a blip — it’s structural. An estimated 60% of returns at one women’s brand now cite “item too big” or weight loss as the reason, up from 30-40% a year ago. As GLP-1s become cheaper and expand to a pill form, the user base — and the return rate — will likely grow further. Retailers from Levi Strauss to Costco and Walmart are all actively studying the shift.
What’s Next?
Retailers are adapting on multiple fronts: higher restocking fees (one retailer doubled its fee to 20% of purchase price), more detailed size guidance, and shifts in inventory mix toward smaller sizes. Some are applying stricter return policies to reduce “bracket buying” — ordering multiple sizes with intent to return. But the fundamental challenge remains: a consumer base in active physical transition is inherently difficult to serve with fixed-size merchandise. As GLP-1 adoption widens, the retailers best positioned will likely be those with strong loyalty data, flexible return economics, or direct-to-consumer models where they can engage customers through their weight-loss journey rather than just at the point of purchase.
Source: The Wall Street Journal
