Alterations for a skinny kid

[kjlutz]

So I bought some Ottobre magazines and was very excited to start sewing for my two year old until I realized what a pain it was going to be to sew for her...

She has an 18 inch chest and is 32 inches tall (so in Ottobre sizing that is about size 62 around and 86 tall). 
I know I can adapt things that include those two sizes, but my question is about all the pretty dresses that only start at size 92 or 98 (so 1 or 2 sizes 2 big) is there any easy (ish) way to alter those to fit my tiny kid.   

[PeachieClean]

Is there any chance you can start with something pre-existing to trace around first?  I'll be perfectly honest and say I've no idea what ottobre is, but a lot of times you can use something that already fits as a starting place for sewing.  Just don't forget to add seam allowance!

[kjlutz]

Thanks for the idea PeachieClean, I will keep that possibility in mind, but most things we have don't fit her very well to start with.