Place one end of the tape measure at the fullest part of your bust, wrap it around (under your armpits, around your shoulder blades, and back to the front) to get the measurement.

Measure directly under your bust (around your rib cage, where your bra band sits), keeping the tape level to the floor.

Use the tape to circle your waist (like a belt) at your natural waistline, which is located above your belly button and below your rib cage.

Start at one hip and wrap the tape measure around your rear, around the other hip, and back to where you started. Make sure the tape is over the largest part of your buttocks.

Lay your jeans flat and buttoned. Pull the front waistband upwards so that the top edge is flush with the back waistband. Measure the waistband from end to end and multiply this number by two.

Measure across the base of the zipper from edge to edge then and multiply this number by two.

For the thigh, measure straight across the leg 2.5cm down from the crotch and then multiply this number by two.

For the leg opening, measure across the bottom of the leg at the opening and multiply by two.