This was a Christmas gift for my nephew, who was 18 months old at the time. It is another Oliver + S sketchbook shirt. The first two were short-sleeved, size 12-18 months, and the second one had a 1/4 inch broad shoulder adjustment. This one is a long-sleeved 2T with the same broad shoulder adjustment.
I was looking for a nice plaid flannel, but the fabric I ended up finding at my local quilt shop was more like a homespun kind of thing than a true flannel. I did all french seams, including the armscyes, and cut the yokes and pocket on the bias. I used this tutorial from Really Handmade to figure out the plaid-matching at the plackets and side seams. I think it turned out really well!