We've been mostly raising our son in the USA and in Africa up until now and nappy sizes are done differently there. Does anyone know what the equivalent to a size 4 is in Australia? I know it goes by weight and all that but our son has always moved into the next size up even as much as 6 months before he's reached the minimum weight on the package. He's tall and thin, aged 19 months, and his weight is 10.5 kgs. I was thinking he might be a toddler or maybe even walker in Huggies.

What do you think? Help!