It's Asian size,please check the detail sizer on the size chart image.
<br />100% Brand New.
<br />Brand: Coofandy
<br />Material: Cotton Blend
<br />3 Colors for your choice: Wine Red, Black, Blue
<br />Style: Formal
<br />Neck: V Neck
<br />Sleeve: Sleeveless
<br />Length: Regular
<br />Decoration: Dummy Pocket
<br />Pattern: Patchwork
<br />Occasion: Business
<br />Unique style, make you more fashion and handsome.
<br />Garment Care: Hand-wash and Machine washable.
<br />Package Content: 1 x Men Vest
<br />Note:
<br />1. Hint for choosing proper size, use similar clothing to compare with the size.
<br />2. Choose larger sizes if your size are same as the flat measurement Size chart.
<br />3. Please ignore the tag size comes with the clothes. The tag size sometimes can be a larger than our description size because those are for Chinese. We are 1 or 2 sizes smaller than European and American people.
<br />4. As different computers display colors differently, the color of the actual item may vary slightly from the above images, thanks for your understanding.
<br />Size: Asian size is about  1-size-smaller than US size, so make sure you have checked the following chart before purchasing: (please allow 1-2cm differs due to manual measurement, thanks)