To take the right measure, please find the clothes that fit you well and measure it.
Button up the clothes and lay it on a flat surface. Measure from left edge to right edge just below the sleeves.
Button up the clothes and lay it on a flat surface. Measure from left edge to right edge at the waistline.
Wearing a shirt that you like, measure with an arm at your side, from the shoulder's seam all along the arm until you find the desired length. We recommend that the sleeve should go to the base of your thumb (located at the wrist joint).