|Embroidered trim chemise
The chemise pattern at left is from Peterson's magazine Dec 1960, but has no scale. The layout is based on the width of cloth, each body piece being 2 widths, but I don't know the standard width of cotton in 1860. I know fabric widths ranged from 20 and 35 inches until very recently. 22" wide seems a decent guess, given the couple existing garments I've quickly researched plus common sense.
I'll have to buy some cotton voile or other fine cotton or linen cloth, plus desired trim. A chemise like this could work belted as a dress in summer, under a corset for a Steampunk party, or just to keep cool on a summer evening.