This very cute OOAK long-sleeved babydoll top is from DiY queen, Label of Hope. It features a rather low and wide neckline which may require wearing a tank top underneath, such as Hope is in her photos (see my photo below to see it without the tank top, and with wrinkles). It's made of various stretch cottons, and is a size S/M.
I wore this top once or twice, and it is in mint condition. The 'white' in the white and red striped fabric looks more off-white than I remember, but it has been properly stored for the two years it's been in my closet (so it might just be my memory that's wrong).
The listing price is $10.