Is a 26 inch waist a size zero?

Answer 1

I think that there's considerable variation between brands, but in general a 26-inch waist (depending on LOTS of other factors, such as where the waistband sits, your hip measurement, body composition, thigh circumference, etc.) would fit best in a US standard size 4 or 6P (size 6 petite). Since a lot of clothing manufacturers, in women's sizes, tend move by odd rather than even-number measurements (in Level 99 jeans, for example, 23 = 0, 25 = 2, 27 = 4, 29 = 6/8, etc.) you might occasionally be able to/have to drop down to a 2, especially if your hips are narrower, I imagine.