Kim Kardashian showcased her tiny waist in news snaps from her $150 million private jet amid her trip to Japan with daughter North.

The 42-year-old stunner flashed her six-pack abs in jeans customized by her four children, paired with a skintight white crop top.

The jeans fit loosely around her waist, and had hand drawn messages from her kids North, nine, Saint, seven, Chicago, five, and Psalm, four.

Kim revealed they gifted her the jeans for Mother’s Day this year.

‘I just love my babies! For Mother’s Day this year they made me these jeans and they were so happy when they saw me wear their work of art!’

‘Every Mother’s Day they have drawn on clothing for me that I will keep forever! I love seeing their personalities shine through their art! You can tell  which one of my kids drew on what side of these jeans. From Psalm’s foot and hand print to Saint’s soccer drawings, North’s backwards letters and Chi’s hearts… I will cherish these forever!

She snapped her mirror selfies in the bathroom of her private jet.

Kim purchased her private jet – which she has dubbed Kim Air – for $150 million last year.

The plane has cashmere seats – and she requires guests to go shoeless on the plane – giving them custom SKIMS slippers instead.

One day prior, Kim shared a number of snaps and videos from her trip to Japan to her Instagram page on Thursday.

Kim enjoyed a trip to Tokyo with daughter North, nine, and her pal Everleigh and her mom Ashley Yano.

Kim, 42, showcased her flat stomach in a cropped graphic shirt with dark denim bottoms.

North beamed alongside her mom, rocking a blue and orange collared top – channeling her dad Kanye West – who wore a similar look he wore in 2004 during his promotional tour of his album The College Dropout.

Kim, North and their friends also enjoyed visiting Universal Studios Japan during their vacation.

Kim also posted a snap of herself – taken by North – as she rode up an escalator.

The mom on four sported high-waisted light wash denim bottoms, with her trim midsection of display.

Kim paired it with a cropped gray top and pulled back tresses.

The group enjoyed a trip to Universal Studios, which is located in Osaka, Japan.

They went to Universal Wonderland in the park, home of Hello Kitty and Friends, whom they met.

Kim and North wore matching ears for their snap with the characters.

The SKIMS founder also shared clips of a skit North and Everleigh did in Japanese, as well as watching Geisha women perform during dinner.

Kim also shared gifts and flowers North surprised her with to thank her for the trip, as well as a handwritten note.