Long sleeve shirt

1. Chest: 
Measure 2 inches below the armhole

2. Length: 
Measure from the highest point of the shoulder seam to bottom 

3. Sleeve Length: 
Measure from the center of the collar (where it meets the neckline) along the shoulder seam to the end of the cuff

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Trousers

1-Fit for waist

Measure waist laying the garment straight & relaxed

2-Full Length

Measure from highest waist point to edge of bottom cuff.