Shoppers are voicing their frustration due to a modification that led to items being listed as the wrong size.
This online marketplace has revised its size classifications for women's and children's garments failing to inform all shoppers about the modification.
Many shoppers and sellers are posting online stating that platform listings now display an altered size classification than originally posted as a result of the reclassification.
Vinted explained the new system was more in line with other platforms.
The platform has recommended to examine their items and update the measurements by hand where appropriate, causing user dissatisfaction.
Before the change, the measurements included 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.
For certain items, the measurements have been reclassified - such as a large size was formerly size 12 but is now a UK 16-18.
Frankie Bridger, who produces content about larger sizing, said the change "makes both selling and buying harder".
"Rarely do manufacturers list XL as sizes 20-22," which is what Vinted now does.
Stephanie Gallen, based in Glasgow, stated items she posted featuring size 14 markings were displaying on the service as size 20–22.
"Should someone sized 20-22 purchase these they may become frustrated," she stated.
A different user, from Derby, stated she felt frustrated due to the update requiring manual adjustment the sizes on "every single listing".
"Personally, this is quite irritating, as I'm chronically ill and Vinted sales have been crucial for me since losing part of my income," she said.
The platform boasts over 100 million members, including 18 million in the UK.
It has proved a popular alternative to second-hand platforms like eBay and Depop.
This is not the initial instance that an unexpected update within the service has received backlash: last year, Vinted reversed a change concerning shipment methods due to shopper criticism.
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