Members of the platform have expressed outrage following a change that caused listings displaying inaccurate size information.
The popular resale platform has updated its measurement guidelines for female and kids' apparel without notifying every member regarding the update.
Many shoppers and sellers have taken to social media claiming that product pages now present a modified sizing category than originally posted as a result of the reclassification.
Vinted explained the new system was more in line with comparable marketplaces.
The platform has recommended to check their listings and manually change the size when needed, causing user dissatisfaction.
Earlier, the sizing featured one number and one letter, for instance S/8 or M/10.
The revised method features a letter with a size spectrum for example S/UK 8-10.
With some products, the measurements have been reclassified - like an L measurement was previously a 12 but now shows as UK 16-18.
Frankie Bridger, who makes TikTok content about plus-size fashion, explained the modification "makes transactions more difficult".
"Few clothing companies classify XL as 20-22," as the platform currently indicates.
A different member, based in Glasgow, said garments she listed featuring size 14 markings were showing in the marketplace as size 20–22.
"If anyone [who is] size 20-22 buys them they will likely be quite upset," she stated.
A different user, from Derby, explained she became annoyed due to the update requiring manual adjustment the sizes on "every single listing".
"This situation is especially annoying, as I'm chronically ill and selling on Vinted has been paramount after experiencing income reduction," she said.
The app has more than 100 million shoppers, comprising 18 million UK members.
It has become a favored option versus similar marketplaces including eBay and Depop.
This isn't the first time where an unanticipated change to the app has proved unpopular: earlier, the platform withdrew an update to its shipping options following member complaints.
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