Kim Kardashian’s Skims has been forced to offering refunds for its US$148 ($215) advent calendar after a furious backlash.

The calendar, which promised “12 days of fun surprises”, has been mocked online for the quality of its contents, which one online commenter compared to “something you would find down the back of a sofa”.

The items included in the pricey calendar include hair clips, hair ties and keychains bearing the Skims logo.

One TikTok account called spicychathouse gave the calendar zero stars and compared its contents to things “my cat collects from around my house”.

Customers were unimpressed with the calendar offerings. Photo: TikTok/@lesleyalj

Another account said it looked like “a bunch of stuff that Kim Kardashian was emptying out of her bedside table”.

Skims released a statement conceding that “the calendar didn’t meet expectations”.

“We have personally contacted every customer who purchased the calendar and offered them a choice of a full refund or a SKIMS credit to put towards other products,” the shapewear and clothing business said.

Kardashian co-founded Skims in 2019. It has since made the socialite and reality star a billionaire, according to Forbes magazine.

TikToker Sean Anthony said his offer of a refund or credit from Skims arrived before his calendar.

Sharing a copy of the email online Anthony asked: “What’s going on? Is it really that bad that they had to do an apology tour?”

The Skims emails said: “We want every customer to be happy with what they receive, and we fell short this time.

“Thank you for being our customer, and again, we apologise for the disappointment.”

Kate Vlietstra, senior director at market research analyst Mintel. told the BBC the backlash was “really interesting”.

“It means that, inevitably, if people are not feeling they’re getting the value that they have hoped for from the advent calendar they’ve purchased, then yes, there is going to be a backlash,” she said.