Hi all! I'm looking to make a top-down fingering weight cardigan inspired by this [Mixed by Nasrin](https://mixedbynasrin.com/products/5101-knit-cardigan-pink-and-red-celestial) one (with a much simpler colorwork pattern!!)

I've self-drafted a couple of simple sweaters based on Elizabeth Zimmermann principles, but I had a few questions about this particular construction and thought I would come to you pros! (sorry if this isn't the right place!) I know I could also just try to find a very similar pattern on Ravelry, but if possible I'd like to try to increase my limited knowledge of construction instead of robotically always following patterns.

1. What rate/percentage of decreases in the sleeves would recreate this balloon-y shape, do you think? (It's a drop sleeve, so I assume we're starting with a large amount of stitches at the top already, vs first increasing in the sleeves as I would assume you would do if it were a set-in sleeve with a more fitted body.) And how much should I rapidly decrease when I get to the wrists to create that very puffed shape?
2. Do we think the # of stitches at the waist is decreased for the ribbing at the bottom, or is it getting that cinched-in, slightly puffed look just because of smaller needle size for the ribbing?

help recreating cardigan shape: waist decreases + balloon sleeves question