Confused about Nappy Sizes?????

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!

I would go Walker.......

Lexie (my youngest) is a similar age and weight as your DS. She rarely wears nappies these days, but if I do buy Huggies, this is the size I buy.......

id go walker too

Thanks. I got walker and they worked great. They are a tiny bit bigger than a size 4 if anyone is interested.