Open the Size Chart. Determine if the product uses body or garment measurements. The parameters used can identify this. They are garment measurements if the measurements are in halves, like half chest or half waist. If they are simply waist or chest, then they are body measurements.
A. NECK
Remember, make allowance for comfort. Ask a friend to measure around your neck at collar level. This measurement is your shirt size.
B. CHEST
Measure around the fullest part of the chest, keeping the tape level and straight. Keep one finger between the tape and the body.
C. HIPS
Measure around the waist, keeping one finger between the tape and the body. Over your shirt (not trousers), be in the position you would normally wear your trousers.
Pick a similar garment that you already own that fits you well. Lay the garment out on a flat surface and start measuring.
A. COLLAR
Measure along the collarstand from the centre of the button to the edge of the buttonhole
B. HALF CHEST
Measure across the chest, side seam to side seam, 2cm below where the sleeve joins the body of the garment.
C. LENGTH OR CENTRE BACK
Measure the top of the neckline down to the bottom hem along the centre of the back.