Know what will fit before you buy it.
Little by Little uses your baby’s measurements and our proprietary fit intelligence to recommend the right size in each brand—and predict when it may be time to size up.
Early testers will help us make fit recommendations even more accurate.
The right fit, brand by brand.
Baby sizes shouldn’t be a guessing game.
Baby clothing sizes can vary dramatically from one brand to another. Little by Little turns a few simple details about your baby into something parents can actually use: which size is most likely to fit, in which brand, and for how long.
Tell us about your baby
Share a few simple details so Little by Little can personalize recommendations to your child.
Our fit intelligence gets to work
Our proprietary model evaluates brand-specific sizing and your baby’s changing fit needs behind the scenes.
Shop with more confidence
See the size most likely to fit, our confidence level, and when it may be time to move to the next size.
Smarter recommendations, built around real-world fit.
Our proprietary fit intelligence is designed to understand how baby clothing actually fits across different brands and sizes—so parents can get more useful recommendations than a generic size chart can provide.
Fewer returns. Better fits. Happier little wardrobes.
We’re inviting a small group of parents to help test Little by Little before launch. Join the list to be among the first to get smarter, brand-specific baby clothing recommendations.