Shoppers are voicing their frustration following a change that caused listings displaying inaccurate size information.
The second-hand shopping app has revised its sizing categories for women's and children's garments failing to inform all shoppers about the modification.
Numerous buyers and vendors 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 updated approach better aligns with similar services.
They have suggested members to check their listings and manually change the size where appropriate, causing user dissatisfaction.
Previously, the sizes had both one number and one letter, for instance S/8 or M/10.
The updated approach includes an alphabetical indicator and numerical range for example S/UK 8-10.
For certain items, the measurements have been reclassified - for example a size L was previously a 12 but currently displays as UK 16-18.
Frankie Bridger, who makes TikTok content about plus-size fashion, stated the update "complicates both purchasing and selling".
"Not many brands say XL is a 20-22," as the platform currently indicates.
Stephanie Gallen, based in Glasgow, explained products she uploaded on Vinted with size 14 labels were displaying on the service as larger sizing 20-22.
"Should someone sized 20-22 purchase these they're going to be very disappointed," she explained.
Charlotte Lunn, based in Derby, stated she felt frustrated due to the update requiring manual adjustment the sizing for "all her products".
"Personally, this is quite irritating, because of my ongoing medical condition and Vinted sales have been crucial after experiencing income reduction," she explained.
The app has more than 100 million members, comprising 18 million UK members.
It has become a favored option compared to resale services such as eBay and Depop.
This is not the initial instance where an unanticipated change to the app has proved unpopular: last year, the service retracted a modification to its shipping options after backlash from users.
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