Wear a fitted dress shirt and dress shoes
Keep your posture natural and stand straight
Measure chest around the fullest part under the arms
Measure shoulders from one shoulder point to the other
Measure jacket length from the base of the neck to the desired hem
Measure sleeve length from the shoulder point to the wrist bone
Measure neck around the base of the neck with one finger under the tape
Measure waist at the natural waistline
Measure hips around the fullest part of the seat
Measure inseam from the crotch to the bottom of the ankle
Measure outseam from the natural waist to the bottom of the ankle
Measure thigh around the fullest part of the upper leg
Measure rise from the crotch to the natural waist
Record all measurements in inches or centimeters
Recheck each measurement for accuracy
Use a tailor for the most precise fit