Edit: Thanks to my amazing reader, Greta, this tutorial is being made available to print in PDF form!
Pattern time! We'll start off pretty similar to the Sadie shirt,
So. Find a shirt that fits your child.
Lay it out, folded in half like so. I use freezer paper for my patterns-but you could use anything. Even a few pieces of copy paper taped together. (been there...done that)
Trace around your shirt like so, leaving a 1/2 inch around the shirt to allow for seam allowances.
This is what it should look like!
Make sure to trace where it dips lower in the front.
Now I am using my Sadie shirt bodice piece, but you can go ahead and use the pattern piece shown above you just made. Just so's you know why mine's different in the pics.
What I did was trace around the neckline and arm holes, and then flipped it and marked where the other side was, and drew a swooping line from shoulder to opposite armpit, like shown. You may have to fool around with the angle, but it's a pretty simple shape. I hope this is making sense! I then drew the sides, with sort of an a-line shape.
That's your front piece.
For your back piece, trace the sides of your front piece, armholes, and shoulders...
Then your neckline like this: higher than the front piece obvs.
So here's your main pattern pieces!
For the sleeves...trace and cut out your piece like so, this will allow for a bit of gathering and make it easier to fit into the arm hole. Mark where the fold should be, too.
Now, cut out your pieces! Make sure when you're cutting out the front pieces, that your fabric is wrong sides together (or right, just don't cut them the same way)
Not shown: also cut one of your back piece, and two sleeves on the fold. tada!
Tomorrow: bias tape stuff!