I wear XS in Walmart usually (they typically run big).. wearing XS in everything but I did my true small in the first pair of pjs, sized up to a M in the white bow sweater (wish I did my true S though.. so stick with your true sizing), and I went up in both blue pullovers too for a baggy fit! Be sure to size DOWN in the jeans 1-2 sizes. The embellished pair are a 0 and still big.. and the other pair are S and way too big. Prob need XXS. Hope this helps!! ♥️