I joke to my colleagues that the Liz line is the "Black 'n Decker' of foundation garments with respect to its durability and stability; I could do cartwheels and everything would stay in place. I'm 5'11", 170lbs, wear a Canadian size 8/10 dress, size 10/12 bottoms to accommodate 42" hips, with a 31" ish waist. I've worn both UK 16 and UK 18 Liz panties in both black and white, and both sizes and colours are great. (When the white first came out, my US12/UK16 was sold out and since I only order annuallly or biannually, I had to make do with the US14/UK18s which I found I prefer at 170lbs. (When I'm 150lbs 30" natural waist, I can easily wear the UK 14 however it is tight.).
When I reduce my waist by 4"-5" while corseted, the Liz nicely shrinks flat. The Liz has also been holding up despite being worn overtop of metal corset busks, with the only damage being waist stitching caching on the busk nubs which certainly ain't WKD's fault. The Liz has ben my workhorse, being worn about 3-4 times per week (along with the matching garter belt).
Thanks again for making these in white!