Members of the platform have expressed outrage due to a modification that led to listings displaying inaccurate size information.
The popular resale platform has updated its measurement guidelines for women's and children's clothes but did not contact all shoppers about the modification.
Online Platforms Response
Numerous buyers and vendors are posting online saying Vinted listings now show an altered size classification than originally posted due to the recalibration.
The company said the new system was more in line with comparable marketplaces.
They have suggested members to review their products and update the measurements by hand where appropriate, which has left users frustrated.
Size Classification Modifications
Earlier, the measurements included numerical and alphabetical indicators, for instance S/8 or M/10.
The new system has an alphabetical indicator and numerical range like S/UK 8-10.
In some cases, the size labels have been reassigned - such as a large size was previously a 12 but now shows as UK 16-18.
Shopper Accounts
Frankie Bridger, who produces content about larger sizing, said the change "makes both selling and buying harder".
"Not many brands say XL is a 20-22," the way the service now categorizes.
A different member, based in Glasgow, stated items she posted on Vinted with size 14 labels were appearing on the platform as measurements 20-22.
"If anyone [who is] size 20-22 buys them they will likely be quite upset," she stated.
Necessary Adjustments
A different user, based in Derby, explained she became annoyed because the modification necessitated personal updates the measurements for "each individual item".
"For me this is particularly frustrating, because of my ongoing medical condition and platform income has been essential following partial earnings loss," she said.
Platform Context
The service features exceeding 100 million shoppers, comprising 18 million UK members.
It has emerged as a preferred choice to second-hand platforms like eBay and Depop.
This isn't the first time where an unanticipated change to the app has proved unpopular: last year, the platform withdrew an update to its shipping options following member complaints.