Type in your baby's foot length and we'll tell you which Grookz size to order. It uses the same measurements as the size chart on our product pages.
Find your baby's size
How to measure your baby's foot
- Put a sheet of paper on a hard floor. Carpet makes for a fuzzy line.
- Stand your baby on it. Not standing yet? Sit them on your lap and press the foot gently flat on the paper.
- Mark the back of the heel and the tip of the longest toe. Keep the pencil straight up. The longest toe isn't always the big toe.
- Measure between the two marks. Inches or centimeters both work.
- Do the other foot too. If they're different, use the bigger number.
Wiggly baby? Try when they're sleepy or busy with a toy. If two tries give you different numbers, go with the bigger one.
Grookz baby shoe size chart
Go by foot length, not age. The ages are averages, and lots of babies run a size ahead or behind.
| Baby Age | Foot length | Insole |
|---|---|---|
| 0-6 MonthsSize 1 | 4.1 to 4.5 in10.5 to 11.5 cm | 11.6 cm4.6 in |
| 7-12 MonthsSize 2 | 4.5 to 4.9 in11.5 to 12.5 cm | 12.5 cm4.9 in |
| 13-18 MonthsSize 3 | 4.9 to 5.3 in12.5 to 13.5 cm | 13.5 cm5.3 in |
| 19-24 MonthsSize 4 | 5.3 to 5.7 in13.5 to 14.5 cm | 14.8 cm5.8 in |
| 2-3 YearsSize 5 | 5.7 to 6.1 in14.5 to 15.5 cm | 15.5 cm6.1 in |
Right on the line between two sizes? Pick the bigger one. Not every style comes in 2-3 Years.
Sizing questions
My baby is between sizes. Which one should I get?
Go up one. Babies' feet grow fast, and the knit upper on our sock shoes hugs the foot, so a little extra length is fine. The size finder does this for you when a foot is right at the top of a size.
Should I go by age or by foot length?
Foot length. The ages on our sizes are averages, and plenty of babies are a size ahead or behind. A 9-month-old with long feet might need 13-18 Months.
How much room should there be at the toes?
About 1 cm (3/8 inch) between the longest toe and the end of the insole is plenty. Sock shoes stretch, so a little less is okay too. If the toes look curled or pushed against the front, go up a size.
How often should I measure?
Every two to three months until they're about two. Little feet grow quickly in the first couple of years, and a baby won't tell you their shoes feel tight.
What if the size I order doesn't fit?
You can return unworn pairs in their original packaging within 30 days. Our refund policy has the details.
Do you have sizes for kids over 3?
Most of our styles stop at 2-3 Years, which fits feet up to about 6.1 inches (15.5 cm). Some of our Baby First Walkers also come in 3-4 Years.