Rachel and son Kayden (Image: Rachel Loyns)

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A mum was left shocked when her 10-year-old son only just managed to squeeze into her Primark jeans despite them being a women's size 14.

Rachel Loyns, 29, had taken the blue jeans to her mum's so she could include them in her next trip to the charity shop because she could 'barely fit one leg in them'.

But the mum-of-two said her mum had assumed they were son Kayden's and gave him them to put on.

Speaking to the Mirror, Rachel said: "They were way too tight for me, I can’t even get a leg in."

Kayden is 10 years old and mum Rachel said he's quite tall and slim, but the whole family saw the funny side when they realised they were actually his mum's trousers.

The youngster wore the jeans well, they didn't appear too long for young Kayden, who is about 4ft 10 and normally wears clothes for a 11 to 12 year old, and they were not baggy on the ankles either.

The post on Facebook
(Image: Rachel Loyns)

Rachel, a make-up artist from Cardiff, posted a photo of her son in the jeans to a Facebook group where fans of the shop share their top tips and latest buys.

She posted: "My son is 10 and 4”11 (ish) teenagers size 11-12 clothes and he fits women’s size 14 Primark jeans.

"And no wonder they don’t fit me. I’m 5”11 and size 12-14 bottoms."

She added that she posted the images to share with others who are worried when sizes don't fit them, as she knows it can affect people's self esteem when clothes don't fit you when you think they will.

Rachel said: "That's why I posted it. So many girls in the comments said 'well I feel better now'."

Almost 600 people reacted to her post with 135 making comments.

Kayden, 10 and his sister Niveah, 9
(Image: Rachel Loyns)

One said: "Glad I saw this, I’m usually a 14 in bottoms and couldn’t get a pair past my thighs last week, felt terrible about it."

Another added: "I had a pair of Mam jeans, I’m a size 10/12 normally so bought a 14 as people told me to size up. They didn’t fit so got a 16, didn’t fit so then got an 18, they were still tight ended up with a size 20 that just about fit."

One posted: "I had a breakdown in Primark because I wasn’t fitting into any of the jeans in my usual size."

While another added: "I’m baffled at why sizing is still not a universal thing for all shops instead of a different size for every shop.

"No wonder people suffer with body issues and confidence when in one shop people are a 10 and in another a size 16. Just ridiculous."

A Primark spokeswoman told the Mirror: “The fit of our clothing is really important to us and we welcome any customer feedback.

"All of our clothing is made to industry standards using Size UK Data and we offer a wide range of sizes with our jeans available from size UK 4 to UK 22."