Members of the platform have expressed outrage after an update resulted in listings displaying inaccurate size information.
The second-hand shopping app has altered its size classifications for female and kids' apparel failing to inform all shoppers about the modification.
Numerous buyers and vendors are expressing on platforms saying Vinted listings now show a modified sizing category compared to what was initially listed because of the remapping.
The platform stated the new system was more in line with comparable marketplaces.
It has advised users to check their listings and manually change the size where appropriate, resulting in member annoyance.
Earlier, the sizing featured numerical and alphabetical indicators, for instance S/8 or M/10.
The updated approach includes a letter and a range for example S/UK 8-10.
In some cases, the sizing has been recategorised - such as a large size was previously a 12 but currently displays as UK 16-18.
One content creator, who makes TikTok content about plus-size fashion, said the change "makes both selling and buying harder".
"Rarely do manufacturers list XL as sizes 20-22," which is what Vinted now does.
Another user, located in Scotland, stated items she posted on Vinted with size 14 labels were showing in the marketplace as measurements 20-22.
"If buyers measuring 20-22 acquire them they're going to be very disappointed," she stated.
Another shopper, from Derby, stated she felt frustrated by the change as she had to manually change the sizing for "all her products".
"Personally, this is quite irritating, since I have chronic health issues and selling on Vinted has been paramount for me since losing part of my income," she said.
The service features exceeding 100 million members, including 18 million in the UK.
It has become a favored option compared to resale services such as eBay and Depop.
This isn't the first time when a surprising modification to the app has proved unpopular: last year, Vinted reversed a change regarding delivery choices after backlash from users.
Rashid Al-Mansoori is a tech journalist with over a decade of experience covering innovations and digital transformations in the Middle East.
