But I do not understand why the dimensions are not unique.
I have already bought pants MFH me tens of years ago, and as a clear indication of size was sewn with waist size and length. This seems no longer to be made.
Compared with German sizes MFA pants are 1-2 sizes larger. The apparently identical except for the name normani pants seem seem to mind "German" one size specification. The normani in XXL seems the XL size of MFH match.
By comparison, the mean "old" MFH-pants in XL has the dimensions 99-109cm waist, 74-82cm stride. So stehts on the label:
BDU Battle Dress Uniform
MFH Max Fuchs pants
Extra large
Waist: 39 to 43 inches
Inseam: 29 1/2 to 32 1/2 inches
NATO SIZE 5252/5454
BDU Trousers
DLA 100-90-C-0301