Kylie Jenner’s BFF Stassie Karanikolaou flaunts VERY tiny waist in a skintight workout

Kylie Jenner’s best friend, Anastasia ‘Stassie’ Karanikolaou, flaunts a VERY small waist in a skintight workout outfit as she heads to a gym in West Hollywood.

Anastasia Karanikolaou was seen on her way to an exercise class in West Hollywood on Thursday.

The 25-year-old social media star flaunted her flawless figure in a GLOWMODE workout outfit, which showed off her toned arms and flat stomach in the hot California sun.

The beauty – who recently showed off her new collaboration with the Cupshe brand – opted for a navy blue ensemble.

Her sports bra top featured thick straps and a low-cut neckline to flaunt her voluptuous chest.

She also donned a pair of leggings, tall white socks, and a pair of gray and blue sneakers.

Ready for the gym: Anastasia Karanikolaou was spotted on her way to an exercise class in West Hollywood

Anastasia, who also goes by the nickname Stassie, enjoyed the warm Hollywood weather as she headed to the gym.

She wore her long brunette locks in a high ponytail in preparation for her next gym session.

The model accessorized with a pair of rectangular-frame sunglasses on her makeup-free face and a simple pair of jewelry-like silver earrings.

Over her shoulder, she slung a small black bag and carried her car keys in one of her manicure-free hands.

This outing to the gym comes on the heels of her revealing her new spring campaign with cupshethe fashion and swimwear brand.

Kylie Jenner’s longtime best friend shared with Dailymail.com that she is delighted to be working with the brand.

“I’ve always loved swimwear and trying new styles, so when I had the opportunity to partner with Cupshe, I really wanted to focus on the fit and versatility of the styles,” she shared.

“The team at Cupshe have been so good at this partnership that they allowed me to take artistic direction and introduce more variety into the collection so that the selections are really pieces that I would wear or my friends would wear.”

Coming out: The 25-year-old flaunted her flawless figure in a GLOWMODE workout outfit

Coming out: The 25-year-old flaunted her flawless figure in a GLOWMODE workout outfit

Fantastic Physique: Her sports bra top featured thick straps and a low-cut neckline to flaunt her voluptuous chest.

Fantastic Physique: Her sports bra top featured thick straps and a low-cut neckline to flaunt her voluptuous chest.

On the go: She slipped into a matching pair of navy leggings and a sports bra.

On the go: She slipped into a matching pair of navy leggings and a sports bra.

Stunning: The social media star recently showed off her new collaboration with the Cupshe brand

Stunning: The social media star recently showed off her new collaboration with the Cupshe brand

Collaboration: He told Dailymail.com the zebra print suit was his favorite

Collaboration: He told Dailymail.com the zebra print suit was his favorite

She went on to mention that she has always been a fan of the brand.

“Cupshe’s support and variety is what draws me most to the brand,” said the Los Angeles resident.

“There aren’t a ton of nice swimwear brands that offer different levels of coverage and quality than Cupshe,” she added.

The beauty then named her favorite piece from the collection.

‘My favorite piece from our collection is definitely the zebra print swimsuit. I love how the pattern is so dimensional but also very elegant and simple,” she added.

She also told DailyMail.com that her personal style is in the collection.

“My Cupshe collection is versatile, very close to my own style,” the star noted.

‘There are pieces that are super classic and simple; and others who are bolder and more outgoing. There really is a suit for any kind of mood you’re in,” she shared.

Abs for days: Kylie Jenner's longtime best friend shared that she's thrilled to be working with the brand.

Abs for days: Kylie Jenner’s longtime best friend shared that she’s thrilled to be working with the brand.

A splash of colour: 'The Cupshe team have been so good in this partnership'

A splash of colour: ‘The Cupshe team have been so good in this partnership’

Sultry: 'Cupshe's support and variety is what appeals to me the most about the brand'

Sultry: ‘Cupshe’s support and variety is what appeals to me the most about the brand’

Flaunting: She recently shared a slew of photos wearing outfits from the collection on her Instagram.

Flaunting: She recently shared a slew of photos wearing outfits from the collection on her Instagram.

Recently, the influencer has been flaunting the pieces on her personal Instagram account, which boasts 11 million followers.

She showed off her curvaceous form while posing in a yellow bikini next to a pool.

The bombshell also shared some photos of her favorite piece from the collection, the white bikini top with a zebra print and matching bottom.

Stassie accessorized with a sparkling pair of rings, and her gorgeous dark brown hair cascaded down her back in all the snaps.