Ah the sleeves. I challenged myself with these, I had never used Chiffon before and had only done french seams once in my second year as a sample. The same goes for the style of the lower sleeve, the tight fitted sleeve.
My mock-up of the sleeve, next to the sample of the striped ribbon on the sleeve cap and the pink chiffon sleeves for the bottom.
I used a product called steam a seam to attach the ribbon to the sleeves. My mother, a quilter told me about it and generously let me use her supply of it to attach the pink ribbon detail to my purple satin.
I'll be going back to my sailor cosmos costume and re-doing the star burst rainbow ribbons with this stuff.