Wearing an XS in the top and a 0 regular in the jeans (these do not have much stretch compared to the flare jeans from the same brand so I would go with your true size or size up one). I’m 5”6 for reference. I sized down a full size in the sneakers I’m usually a 8.5 and did a 7.5! LTKgrwm LTKootd LTKdayinmylife