How to measure
Think of a line going from your armpit straight upwards to your shoulder. Measure between those two points and hold the tape measure straight.
The chest measurement is taken as a circumference measurement around your chest at the widest point. Stand in a relaxed posture and breathe out.
The sleeve length measurement is taken from the point of your shoulder (where you took the shoulder width measurement), following your bent arm down to where you want the sleeve to end. Bend your arm slightly when taking this measurement. This measurement is the full length of the arm.
The tops length measurement is taken from the top of the shoulder, close to the mid side of your neck, following your body down to the point where you want your tops to end.
With the pants/trousers buttoned up, spread the pants/trousers on a table, floor or any other flat surface, with outseams on both corners. After removing all wrinkles and any fullness, measure the length from the top of the waistband.
The waist measurement is taken as a circumference measurement around your waist just above your belly button. Stand in a relaxed posture and breathe out.
Starting at the crotch seam and ending 1–2 inches below the hip area.
4. Leg Opening
Spread the pants/trousers on a flat surface e.g. table or floor. After removing any fullness or wrinkles, start measurement beginning from one side of the leg opening to the other side of leg opening.
The seat measurements Just take a circumference measurement around your seat at the widest part and you're good to go.
6. Front Rise
With the pants/trousers buttoned up, spread the pants/trousers on the floor or table; next remove all wrinkles, and measure this region by starting from crotch seam spot to the spot of the waistband.