Vinted users have been reacting angrily following a change that caused products showing incorrect sizing.
The popular resale platform has revised its sizing categories for female and kids' apparel without notifying all users about the change.
Countless users and merchants are posting online claiming that product pages now present a modified sizing category than originally posted due to the recalibration.
Vinted explained the updated approach better aligns with similar services.
The platform has recommended to check their listings and adjust the sizing manually where appropriate, causing user dissatisfaction.
Earlier, the sizes had both a single numeric size and a letter, like S/8 or M/10.
The new system has an alphabetical indicator and numerical range like S/UK 8-10.
For certain items, the size labels have been reassigned - like an L measurement was formerly size 12 but now shows as UK 16-18.
A fashion influencer, who makes TikTok content about plus-size fashion, stated the update "complicates both purchasing and selling".
"Rarely do manufacturers list XL as sizes 20-22," as the platform currently indicates.
Another user, from Glasgow, stated items she posted on Vinted with size 14 labels were displaying on the service as size 20–22.
"Should someone sized 20-22 purchase these they will likely be quite upset," she said.
Another shopper, based in Derby, said she had been left angered by the change as she had to manually change the sizing for "all her products".
"This situation is especially annoying, as I'm chronically ill and selling on Vinted has been paramount for me since losing part of my income," she stated.
The service features exceeding 100 million shoppers, including 18 million in the UK.
It has emerged as a preferred choice to second-hand platforms like eBay and Depop.
This isn't the first time when a surprising modification on the platform has faced criticism: earlier, the service retracted a modification concerning shipment methods due to shopper criticism.
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