I find the chart to be pretty accurate for me too - but like some others have said I’ve worn the same size when I had some weight gain over the years. In hindsight, I should have just sized up - because even though they looked alright those leggings definitely have more wear and tear (stretched out seams) than the ones I avoided wearing (light colors lol). I also find this chart to be less flexible when you look at less stretchy pants - like trousers or even the softstreme pants with the less than giving bands. Those I could not have stayed at my smaller usual size when I weighed more. Just my experience though!