Ok, I took exact measurements (I measured roughly 45 in around the waist). Per the chart, I'd be 5xl. So, I ordered 5xl. Got it today & tried it right away. I was disappointed that without much effort I was able to tie the tightest hooks (I was hoping I'd have to loose a few inches first). Then once on, I realized it could easily be pulled up or down a few inches with little effort. Lastly once I saw how 'roomy' this corset was (could fit 3 fingers in the side gaps at the top), I knew I had to send it back.  Two stars as it seems well made but the sizing is off and if I pull it all the way up, it doesn't cover my lower belly. For reference I'm almost 5'8. If there was a long torso option I'd reorder in a size or 2 smaller.