SHEIN culottes with robe type cardigan

I wore this one time on a plane. The culottes have a stretchy waistband (as you can see from the picture the elastic inside came twisted, but I just rolled the entire waistband so it didn’t bother me), and the cardigan comes with a removable sash that you can tie like a rope. I am usually always a small but this extra small fits. It says it is size 2.