Vinted users have been reacting angrily following a change that caused products showing incorrect sizing.
The popular resale platform has updated its measurement guidelines for women's and children's clothes without notifying all users about the change.
Numerous buyers and vendors are posting online stating that platform listings now display an altered size classification compared to what was initially listed as a result of the reclassification.
Vinted explained the revised method more closely matches other platforms.
The platform has recommended to review their products and adjust the sizing manually where appropriate, causing user dissatisfaction.
Previously, the sizes had both numerical and alphabetical indicators, like S/8 or M/10.
The new system has a letter with a size spectrum such as S/UK 8-10.
In some cases, the sizing has been recategorised - like an L measurement used to be a 12 but currently displays as UK 16-18.
A fashion influencer, who creates plus-size fashion videos, said the change "makes both selling and buying harder".
"Not many brands say XL is a 20-22," the way the service now categorizes.
Stephanie Gallen, located in Scotland, said garments she listed 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 said.
A different user, from Derby, stated she felt frustrated by the change as she had to manually change the sizing for "all her products".
"For me this is particularly frustrating, as I'm chronically ill and platform income has been essential following partial earnings loss," she explained.
The app has more than 100 million users, comprising 18 million UK members.
It has become a favored option versus similar marketplaces including eBay and Depop.
This isn't the first time when a surprising modification within the service has received backlash: last year, the platform withdrew an update regarding delivery choices following member complaints.
A UK-based cultural commentator with a passion for analyzing societal shifts and emerging trends in fashion and lifestyle.