M's Trekking Pants Size Chart

1-Waist
 2-Hips 3-Inseam 4-Opening
28 15 19 30 7
30 16 20 31 7.25
32 17 21 31 7.5
34 18 22 32 7.75
36 19 23 32 8
38 20 24 32 8.25
 

*All measurements are in inches and were calculated on flat garments.