Simple pant pattern

2-17-desired length
1-2=3-4=(hip measurement + ease + 2x front crotch* + 2x back crotch**)/4
1-4=2-3=crotch depth + 2 inch(1 inch for children)
(!To measure crotch depth, refer to the diagram below)
2-5=1-6= hip depth (see diagram below)
*4-7=front crotch=hip measurement/4 x 15/100
7-7'=4-7
1-9=4-7
9-10=1 inch(for children 0.5 is enough)
**6-8=back crotch=3x front crotch
1-11=back crotch + 1-2 inches
11-12=1 inch(for kids 0.5 inch)

4-15=crotch to knee distance
4-13=13-15
13-14=0.5-1 inch
15-16=desired knee circumference
17-18=desired cuff circumference (!knee and cuff should be equal or the cuff slightly narrower than knee)