Just go by weight! Our sizing is based on real toddler bodies — not guesswork. 

 Our sizes typically run:
- Small: 1-2 years (7-20 lbs | 3-9 kg)
- Medium: 2-3 years (22-35 lbs | 10-16kg)
- Large: 3-4 years (35-55 lbs | 17-25kg)

 If you're in between sizes, we recommend sizing up for more comfort.

 💡 Bonus: Every order is covered by our 75-day fit guarantee. If it’s not right, we’ll exchange it for free — easy.

Yes — and here’s why. 

 Pull-ups feel like diapers… so kids treat them like diapers. That’s the problem. They don’t feel when they’re wet — which delays learning.

UpAiry is different. It looks and feels like real underwear, but has just enough built-in absorbency to catch small accidents without making your toddler lazy. That sensory feedback helps them connect “I need to pee” with “I should go potty.”

It’s the difference between managing messes and actually making progress.

That’s normal and more common than you think — and it doesn’t mean you’re failing.

A lot of toddlers resist potty training because it feels like pressure. UpAiry takes that pressure off by giving them real underwear they feel proud of. No gimmicks. No shame. Just the feeling of being in control.

We’ve seen the most “stubborn” kids suddenly want to try — simply because they get to wear undies like a big kid.

Sometimes, that’s all it takes.

Yes! Our training pants are designed to keep your child dry and comfortable all night. They’re leak proof but still let your child feel when they’re wet, helping with potty training even during sleep.