When will they size up?

Babies grow into the next size faster than you'd think. Here's a rough guide to when, from your baby's weight.

Tell us about your baby

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Name (optional)Date of birthSexGrowth charts differ for girls and boys, so percentiles need this.Weight (kg)Height (cm)Blood group (optional)Born early? Weeks at birth (optional)Used to correct growth percentiles. Vaccination dates are never corrected.Email me the plan (optional)One email with a care plan and the upcoming vaccination dates. We keep the address so we can send it, and nothing else.

When will they size up?

We follow your baby's own growth curve, not an average one - so a bigger baby gets a sooner answer and a smaller one a later answer.

Current weight (kg)

Enter a weight to see the current size.

Full size guide