Trousers
Waist
Measure the top of the waistband from edge to edge and double this
Front Rise
Measure from the centre front at the top of the waistband down to the crotch seam
Back Rise
Measure from the centre back at the top of the waistband down to the crotch seam
Hip
Measure across where your hip would be and double this
In Seam
Measure from the crotch down to the hem on the inside leg
Length
Measure from the top of the waistband down to the hem