It was every bit as much work as making a full sized lady's sweater because stitch for stitch it follows a full sized pattern. It's tiny because I used laceweight handspun yarn and size 1.25mm needles (0000 - 4/0 US) instead of the worsted weight yarn and the much larger 5mm needles recommended.
The resulting sweater is 1/4 scale and fits this vinyl doll, Delilah Noir, and should also fit slim MSD dolls like the Narae I have on order.
Click twice on any of the photos to enlarge a bit for more detail. Once to bring the photo up, and then a second time to enlarge.
I spun the laceweight yarn starting with very soft hand dyed merino and silk roving by Fleece Artist.