Trouser High Rise (measured in Inches flat lay).
Please ensure you are comparing measurements with a comparable style (Same front rise).
H&H   Size   Waist (Flat lay) Hip (Bottom of the fly) Thigh (5cm down from inside leg seam. Single leg)

Front Rise (Crotch seam to top of waistband)

Hem   Width 

24 12 16 9.75 9.25  10
25 12.5 16.5 9.75 9.25 10
26 13 17 10 9.5 10
27 13.5 17.5 10.5 9.75 10
28 14 18 10.5 10 10
29 14.5 18.5 11 10.75 10.5
30 15 19 11 10.75 11
31 15.5 19 11.5 10.75 11
32 16 20 12 11 11.5
33 16.5 21 12.5 11 11.5
34 17 21.5 12.5 11.25 12
35 17.5 22.5 13 11.25 12
36 18 23 13 11.25 12.5
37 18.5 23.5 13.5 11.25 12.5
38 19 24 13.5 11.25 12.5