Shoppers are voicing their frustration following a change that caused products showing incorrect sizing.
The second-hand shopping app has updated its measurement guidelines for women's and children's clothes failing to inform all shoppers about the modification.
Many shoppers and sellers are posting online claiming that product pages now present a modified sizing category compared to what was initially listed due to the recalibration.
Vinted explained the revised method more closely matches comparable marketplaces.
The platform has recommended to examine their items and update the measurements by hand when needed, which has left users frustrated.
Previously, the sizes had both numerical and alphabetical indicators, such as S/8 or M/10.
The updated approach includes a letter and a range such as S/UK 8-10.
In some cases, the measurements have been reclassified - such as a large size was formerly size 12 but now shows as UK 16-18.
Frankie Bridger, who creates plus-size fashion videos, stated the update "complicates both purchasing and selling".
"Not many brands say XL is a 20-22," as the platform currently indicates.
Stephanie Gallen, located in Scotland, said garments she listed on Vinted with size 14 labels were showing in the marketplace as larger sizing 20-22.
"If anyone [who is] size 20-22 buys them they may become frustrated," she stated.
A different user, located in England, said she had been left angered by the change as she had to manually change the measurements for "each individual item".
"For me this is particularly frustrating, since I have chronic health issues and platform income has been essential following partial earnings loss," she explained.
The app has more than 100 million shoppers, with 18 million British users.
It has become a favored option to second-hand platforms like eBay and Depop.
This represents another occasion when a surprising modification on the platform has faced criticism: last year, the platform withdrew an update regarding delivery choices following member complaints.
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