Vinted users have been reacting angrily following a change that caused products showing incorrect sizing.
This online marketplace has revised its size classifications for women's and children's clothes without notifying all users about the change.
Many shoppers and sellers are posting online claiming that product pages now present a different size category versus the original listing because of the remapping.
The company said the new system was more in line with similar services.
The platform has recommended to examine their items and update the measurements by hand when needed, which has left users frustrated.
Before the change, the sizing featured one number and one letter, like S/8 or M/10.
The new system has a letter with a size spectrum like S/UK 8-10.
For certain items, the size labels have been reassigned - such as a large size used to be a 12 but currently displays as UK 16-18.
Frankie Bridger, who produces content about larger sizing, explained the modification "makes transactions more difficult".
"Not many brands say XL is a 20-22," as the platform currently indicates.
Another user, from Glasgow, stated items she posted with size 14 tags were showing in the marketplace as larger sizing 20-22.
"Should someone sized 20-22 purchase these they will likely be quite upset," she explained.
Another shopper, located in England, stated she felt frustrated by the change as she had to manually change the sizes on "every single listing".
"For me this is particularly frustrating, since I have chronic health issues and platform income has been essential following partial earnings loss," she said.
The platform boasts over 100 million members, comprising 18 million UK members.
It has become a favored option versus similar marketplaces including eBay and Depop.
This represents another occasion that an unexpected update on the platform has faced criticism: last year, the platform withdrew an update regarding delivery choices following member complaints.
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