I've been given my first cloth kit (the green dungarees age 2-4) and am keen to start, but have no sewing experience except resewing on buttons! So I have some embarrassingly ignorant questions before I pluck up the courage to get my scissors anywhere near the pattern…

The instructions say to identify the pattern pieces for the size I want to make (my son is 2) but I can only see one place to cut around the pieces. There is a number '2' near the bottom of the dungarees but that's all. Does that mean I cut across there for age 2? Once I'd sewed the hem that would make the bottom of the trouers come halfway through the circle pattern, I think?

Also the broken lines on the leg pieces… what are those? Are they to show the seam allowances? They aren't all 1.5 cm from the edges, don't go all the way down the trouser legs and at some points they cross over and go outside the outer edge.

Feeling rather thick, here - any help would be much appreciated! If I manage this I will be so proud…