Note: the following dimensions show the size of the pants. You could measure your similar pants then compare to this size chart to choose the best fit size.
Size Chart(Unit:inch)
*28W: Waist–29″, Thight–20″, Hip–35″, Length–21″
*30W: Waist–30″, Thight–21″, Hip–36″, Length–22″
*32W: Waist–32″, Thight–22″, Hip–38″, Length–22″
*34W: Waist–34″, Thight–23″, Hip–40″, Length–22″
*36W: Waist–37″, Thight–24″, Hip–43″, Length–22″
*38W: Waist–39″, Thight–25″, Hip–44″, Length–22″