This lovely underdress is made from two different fabrics which were sewn together to create what we know as a bodiced petticoat. The plain fabric bodice is constructed like a bib-front gown with a wide waistband. The sleeves are particularly snug and short, so they would not interfere with the sleeves of the dress or spencer worn over them. The skirt is made from a heavy dimity with 4 hem tucks and is easily worn as an outer garment.
This underdress would have been worn under a gown or spencer and over a shift, stays, and maybe one petticoat depending on the weather and fabrics.
Check the measurement charts for sizing. Patterns are printed on 20lb weight paper, with multiple sizes each uniquely color-coded on the pattern. Includes documentation, photographs, drawings, and sewing instructions focusing on period construction methods, but can be sewn using modern sewing machine methods. The person who buys any one of these patterns can be confident that the pattern shapes are period correct which allows the individual the option to be as period correct in sewing techniques and construction as he or she wishes to be.