The darker color is more like a 4T but could be 1/2 inch larger at the waist.
I would say that for real xsmall it is better to take a small size.
Amazon Essentials Girls Faux Wrap Medium Girls' Clothing and Skirts & Skorts
62 Review
My Lello Little 10 Layer Ballet Girls' Clothing in Skirts & Skorts
42 Review
Effortlessly Stylish Drawstring Pleated Skater Uniform for Girls' Skirts & Skorts
49 Review
DRESSTELLS Skirts Casual Evening Junior Girls' Clothing and Skirts & Skorts
49 Review