These three garments are part of a basic wardrobe. While the pantalettes were a new fangled idea, only some women prefered to wear them under the more narrow and sheer styles of the Regency era. The shift with its short sleeves and more tailored body also worked well under a slimmer silhouette. Interestingly the seam lines at the bodice fit under the bodice and work well with the Fig Leaf Patterns transitional stay even though they belonged to two different women. The seam in the back hits where the top of a typical stays end at the shoulder blade level.
Detachable sleeves became popular after 1810. One can always change the look of a short sleeved gown with these easy to make sleeves.
Shift is graded in sizes 8-18 and 18-28.
Pantalette has a graded waistband and a graded pantalette based on individual thigh measurement, so you can match and mix to fit your own body.
Sleeve has a graded cuff band so you can choose your own size.