Kitaro - Elastic Waist Underwear and Swimming Togs.
These measurements are the short pulled tight to what they should be measurements in centimeters | Measurements are accurate to within 1 - 2 centimeters*
101 - 105cm
106 - 114cm
115 - 124cm
125 - 134cm
135 - 144cm
145 - 154cm
155 - 164cm
165 - 174cm
How to Ensure you order the right size
The easiest way is to take an existing pair of elastic waist pants that fits you well lay it flat and measure across the waist stretched tight.
This give you the half waist measurement once you have this, check the size chart and order the size closest to what you measured on your existing pant.