I used Sweater Wizard to generate a pattern to knit Thom this little vest. From past experience I knew that I would have to alter the pattern, however, because Thom is quite tall and standard patterns for his age always knit up too small for him.
I not only knit it according to his torso length but also pesonalised it to his own measurements around his arms as well. I was pretty pleased that I was able to alter the pattern without too much stress on my part!
I'm really happy with how it turned out and it should be perfect for this in between weather we've been having :-)