Kids Mario Onesie

£39.99

  • Fabric: flannel for exceptional softness and warmth
  • Style: red top with blue dungarees and yellow buttons, red cap hood with the letter M
  • Comfort: roomy cut, zip closure and elasticated sleeves
  • Occasions: gaming birthday parties, Halloween, sibling costumes, bedtime
  • Washing: machine washable, built to last through frequent use
  • Ultra-soft fabric | Warm and comfortable
  • Pyjamas and costume | Two in one
  • Any occasion | Bedtime, parties, film nights
  • Gift-ready | One they’ll actually wear
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Size Chart

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Kids Mario Onesie

Kids Mario Onesie

£39.99

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  • Fabric: flannel for exceptional softness and warmth
  • Style: red top with blue dungarees and yellow buttons, red cap hood with the letter M
  • Comfort: roomy cut, zip closure and elasticated sleeves
  • Occasions: gaming birthday parties, Halloween, sibling costumes, bedtime
  • Washing: machine washable, built to last through frequent use

Girls Mario Onesie takes a child into a Nintendo adventure every night

Our Mario onesie for kids is perfect for young fans of the Nintendo universe. Designed for those who dream of adventures alongside Mario and Luigi, this all-in-one combines softness and style for sweet nights. Inspired by the famous colourful world, the design features iconic elements that make bedtime just as fun.

Made of ultra-soft flannel, this onesie guarantees unmatched warmth and comfort through the long night-time hours. The roomy cut ensures total freedom of movement, letting your child play without constraint before bed.

The doors of the magical Mushroom Kingdom open in a Boys Mario Onesie

Imagine the joy on your son’s face as he slips into his kids Mario pyjamas and feels like a true part of the Nintendo kingdom. This nightwear is not just a onesie, it opens the door to the land of dreams where every night is a new adventure alongside his favourite heroes.

Add this outfit to your child’s night-time wardrobe. Available in several sizes, it fits every young Nintendo fan perfectly. It is the ideal gift to guarantee evenings full of adventure. Order now and watch your little one thrive in his new favourite night-time costume.

Join the Nintendo universe as a family

The baby Mario onesie lets a newborn sibling share the same soft outfit. The kids Luigi onesie is a great pick for a brother, sister or best friend. Finally, the kids onesies collection gathers every design sized for children.

Frequently Asked Questions

They’re made to keep you warm on the sofa through autumn and winter, so yes, they’re cosy. The relaxed fit lets air move around, though, so you won’t get that stuffy feeling you get from tight pyjamas.
Machine wash at 30°C on a gentle cycle. Turn them inside out and pop them in a mesh laundry bag to protect the hood. Skip the tumble dryer and the iron. They air-dry quickly and fluff right back up on their own.
Yes, every onesie we sell is unisex. The roomy cut works for men and women alike, our kids’ styles fit girls and boys just the same, and our baby sizes are cut the same way for everyone. Just check the size chart to find your fit.
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Kids size chart (measurements in cm)

SIZECHILD'S HEIGHTCHESTSHOULDER WIDTHSLEEVE LENGTHONESIE LENGTH (EXCLUDING HOOD)
3 - 4 years88 - 10288414182 - 85
5 - 6 years103 - 11592424392 - 95
7 - 8 years116 - 125944347102 - 105
9 - 10 years126 - 137964449112 - 115
11 - 12 years138 - 148984554122 - 125