I’m wearing a large in the AirEssentials button up. Depending on how oversized you like it, either stay true to size or size up. I own it in both a large and XL and love the fit of both. My typical size in all Authentic 360 jeans is an XL, petite. I initially ordered these in that exact size, however, I decided to re-order a 1X (regular inseam). While they fit a bit more loose, I much prefer comfort over the label in my pants. These jeans just happened to run a bit smaller than the others, but that’s what I’m here for—to test it out and let you know exactly how they fit so you can make the best decision for yourself when ordering! Use code CMCLAIREXSPANX for 15% off your first purchase + free shipping, excluding sales. LTKootd LTKOver40 LTKMidsize