I've always been fond of "retro" and mid-century aesthetics, and despite the gradual pace at which I've been piecing things together for Astrid, I've had those kind of 1960s and 1970s styles in mind for how I wanted to style her right from the get-go. (A lot of the inspiration for Myrtle's look comes from the same era.) A while ago I found some great fabric at my local yarn and quilt store and thought it would be perfect to make one of those button-down shirts from the '70s with the big collars at a doll scale. The magic of the internet has helpfully informed me that this is called a "dagger collar" - hence the title of this post.
I'm still not the most confident drafting patterns from scratch in this scale, so I decided to start with the JID Girl Shirt Pattern from Antique Lilac as a base. There's a very detailed and helpful tutorial for how to put the shirt together (which I referenced frequently!) at the link, so I'm mostly just going to talk about the modifications I made.