Use a flexible measuring tape
Measure over thin clothing or undergarments
Keep the tape snug but not tight
Stand straight and breathe normally
Measure chest around the fullest part
Measure waist around the natural waistline
Measure hips around the fullest part
Measure inseam from crotch to ankle
Measure sleeve from shoulder to wrist
Measure shoulder width from shoulder point to shoulder point
Measure length from highest point to hem
Record all measurements in inches or centimeters
Double-check each measurement for accuracy