The Jes Pant is meant to be worn very fitted. In fact, sum customers like to size down for a snug fit. 

Size
(UK)
Waist
(inches)
Hip 
(inches) 
Thigh 
(inches)
Inseam 
(inches) 
6 28 33.5 20.25 29
8 29 34.5 21 30
10 30 35.5 22.5 30
12 31 36.5 23.25 30
14 32 37.5 24 30.5

 

All measurements represent the garment measurements. Waist on the Jes Pant sits about 1 inch below belly button.