this Boys hooded cardigan comes in 3 sizes.
3- 6 months, (use 4.00mm hook) 12, months (use a 5.00mm hook) and 18 months. (use a 5.00mm hook)

It is very easy pattern to follow and of course can be made for a girl too.
Due to the style of the cardgian gauge is very forgiving as per style of actual cardigan