Shoppers are voicing their frustration due to a modification that led to items being listed as the wrong size.
This online marketplace has altered its sizing categories for female and kids' apparel failing to inform every member regarding the update.
Many shoppers and sellers are posting online saying Vinted listings now show a different size category versus the original listing due to the recalibration.
The company said the new system was more in line with other platforms.
The platform has recommended to review their products and update the measurements by hand if necessary, resulting in member annoyance.
Before the change, the sizes had both a single numeric size and a letter, like S/8 or M/10.
The new system has a letter and a range like S/UK 8-10.
With some products, the measurements have been reclassified - like an L measurement was formerly size 12 but now shows as UK 16-18.
One content creator, who makes TikTok content about plus-size fashion, explained the modification "makes transactions more difficult".
"Few clothing companies classify XL as 20-22," which is what Vinted now does.
Another user, based in Glasgow, said garments she listed with size 14 tags were appearing on the platform as size 20–22.
"If buyers measuring 20-22 acquire them they may become frustrated," she stated.
Another shopper, based in Derby, stated she felt frustrated due to the update requiring manual adjustment the measurements for "each individual item".
"This situation is especially annoying, as I'm chronically ill and Vinted sales have been crucial after experiencing income reduction," she said.
The app has more than 100 million users, including 18 million in the UK.
It has emerged as a preferred choice versus similar marketplaces including eBay and Depop.
This represents another occasion when a surprising modification on the platform has faced criticism: earlier, the service retracted a modification concerning shipment methods after backlash from users.
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