Sound like you are looking for something on infant developmental milestones.http://www.vhi.ie/hfiles/hf-261.jsp
You can also get from the baby nurse or from http://www.healthpromotion.ie/
A Child Health Record booklet which allows you to keep a record of your baby's development. The booklet contains a height and weight chart, immunisation timetable, record of illness, dental and developmental milestones.
Most of the milestones will have a +/- to the number of weeks/months by which an infant or child should have reached a certain mile stone, as there is a range which is considered the norm.
And yes babies do seem to be a lot bigger then they used to, but the average birth weight has gone from in and around 5 pounds to in and around 8 pounds and currently my niece who is not yet 10 months is too big for 1 year old clothes.