I'm thinking of another 20s sweater. It calls for rayon yarn, but I don't really want to use rayon. It would be similar to the pink 1919 Atlantic City sweater. I don't think that's what I want.
I swatched with Knit Picks Palette, but it was too dense and puffy. I like Palette for denser knits, but not looser, as I found out with the pink and black 1922 sweater.
I'm so annoyed that Jaggerspun went out of business.
I think I might want to do lace weight instead of fingering weight, but I also don't want it too light. I think a wool silk blend. None of the Knit Picks Gloss colors are grabbing me though, because of course I want a color that works both modern and period. So few places have plain, smooth, not variegated yarns.
The pattern calls for 6 stitches an inch, but I want 7. I think that would be the easiest way to size it down. Period books even suggest changing the gauge. The finished size is 42 inches. Changing the gauge would make it 36, which seems much better. It's a T shape, so I'd just have to add a little to the arms and maybe adjust the square neck. Both extremely easy.
If I go with lace weight,it will probably mean a little more math.
I've found smooth rayon fingering weight, and I could always get the silk I used for the 1919 sweater again.
Choosing yarn is so frustrating. I don't even want to think about whatever the next bathing suit will be. So many places carry just a few of each color. Part of why I loved Jaggerspun--one pound cones.
It's this sweater.

From this book
https://www.etsy.com/listing/202721570/leachs-6d-24-c1920-vintage-knitting