Vinted users have been reacting angrily after an update resulted in products showing incorrect sizing.
The popular resale platform has revised its measurement guidelines for women's and children's garments without notifying all users about the change.
Countless users and merchants are expressing on platforms claiming that product pages now present a modified sizing category compared to what was initially listed due to the recalibration.
Vinted explained the new system was more in line with comparable marketplaces.
They have suggested members to check their listings and adjust the sizing manually where appropriate, which has left users frustrated.
Before the change, the measurements included a single numeric size and a letter, like S/8 or M/10.
The revised method features an alphabetical indicator and numerical range such as S/UK 8-10.
With some products, the measurements have been reclassified - like an L measurement was formerly size 12 but currently displays as UK 16-18.
One content creator, who produces content about larger sizing, explained the modification "makes transactions more difficult".
"Few clothing companies classify XL as 20-22," as the platform currently indicates.
Another user, from Glasgow, stated items she posted with size 14 tags were appearing on the platform as size 20–22.
"If buyers measuring 20-22 acquire them they will likely be quite upset," she said.
Charlotte Lunn, based in Derby, explained she became annoyed because the modification necessitated personal updates the measurements for "each individual item".
"This situation is especially annoying, since I have chronic health issues and selling on Vinted has been paramount after experiencing income reduction," she explained.
The service features exceeding 100 million users, comprising 18 million UK members.
It has proved a popular alternative compared to resale services such as eBay and Depop.
This isn't the first time that an unexpected update within the service has received backlash: previously, the service retracted a modification regarding delivery choices after backlash from users.