"Little Mrs. Sommers" is not given much of a physical description in the short story at all. She is described has having pale cheeks, and being tired. Her life situation is also described; Mrs. Sommers has 4 children, all of whom seem to be young still. (The story describes the energy Mrs. Sommers uses to get her children ready, indicating that they are still fairly young). Given these images, and the fact that Mrs. Sommers used to be familiar with luxury before she was Mrs. Sommers, I tend to picture a petite, relatively thin woman in her mid-twenties to early-thirties. She is a woman who looks like she was had money, but now seems worn (yet determined). She is not attention demanding in appearance, but neither is she plain or haggard. Mostly importantly, she carried an expression of one who wants to escape, yet feels guilty for having such a desire.