The pattern for Leo's little jacket came from Anna Maria Horner'sHandmade Beginnings. Honestly, I would have been happy to use the exact fabrics used in her photograph, but I switched it up a little bit to make blue the main color. I also used all flannel, all from her Folksy Flannels collection. It is really high quality and the prints are adorable. I would like to make a lined version of Louisa's jacket with it actually.
My little four month old Leo is already 18 pounds, so I made him the 9-12 month size. Hopefully it will fit him in the spring too.
There were a lot of very curved seams, so lots of patient pinning was required (especially in attaching the sleeves). And it does take time to make a fully-lined jacket, because as other sewers have said, you are basically making two jackets. I like how the button placket worked out, and I enjoyed not having to finish seams (although all the top-stitching sort of makes up for time saved leaving seams raw).
I got the wooden buttons on etsy. A great place to shop for buttons, by the way. I love the variety.