Vinted users have been reacting angrily after an update resulted in products showing incorrect sizing.
The second-hand shopping app has revised its size classifications for women's and children's clothes failing to inform all shoppers about the modification.
Countless users and merchants are expressing on platforms saying Vinted listings now show a different size category versus the original listing due to the recalibration.
Vinted explained the new system was more in line with similar services.
The platform has recommended to review their products and adjust the sizing manually when needed, which has left users frustrated.
Earlier, the sizing featured one number and one letter, like S/8 or M/10.
The new system has an alphabetical indicator and numerical range such as S/UK 8-10.
With some products, the size labels have been reassigned - like an L measurement was formerly size 12 but currently displays as UK 16-18.
A fashion influencer, who produces content about larger sizing, stated the update "complicates both purchasing and selling".
"Not many brands say XL is a 20-22," the way the service now categorizes.
A different member, based in Glasgow, explained products she uploaded with size 14 tags were displaying on the service as larger sizing 20-22.
"Should someone sized 20-22 purchase these they will likely be quite upset," she explained.
A different user, located in England, said she had been left angered due to the update requiring manual adjustment the sizing for "all her products".
"For me this is particularly frustrating, as I'm chronically ill and Vinted sales have been crucial following partial earnings loss," she explained.
The platform boasts over 100 million shoppers, with 18 million British users.
It has proved a popular alternative to second-hand platforms like eBay and Depop.
This isn't the first time where an unanticipated change within the service has received backlash: last year, the platform withdrew an update concerning shipment methods following member complaints.
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