Note: the following dimensions show the size of the shirt. You could measure your similar shirt then compare to this size chart to choose the best fit size.
Size Chart(Unit:inch)
US S = Tag M(Shoulder: 15.99 Inch; Chest:37.44 Inch; Sleeve: 7.8 Inch; Length: 27.69 Inch; )
US M = Tag L(Shoulder: 16.77 Inch; Chest:39 Inch; Sleeve: 8.19 Inch; Length: 28.86 Inch; )
US M+ = Tag XL(Shoulder: 17.55 Inch; Chest:40.56 Inch; Sleeve: 8.58 Inch; Length: 29.64 Inch; )
US L = Tag 2XL(Shoulder: 17.94 Inch; Chest:42.12 Inch; Sleeve: 8.97 Inch; Length: 30.03 Inch; )
US L+ = Tag 3XL(Shoulder: 18.33 Inch; Chest:42.9 Inch; Sleeve: 8.97 Inch; Length: 30.42 Inch; )
US L++ = Tag 4XL(Shoulder: 18.72 Inch; Chest:43.68 Inch; Sleeve: 9.36 Inch; Length: 30.42 Inch; )
US XL = Tag 5XL(Shoulder: 19.11 Inch; Chest:44.46 Inch; Sleeve: 9.75 Inch; Length: 30.42 Inch; )

• Machine Wash Cold, No Tumble Dry; Hand Wash, Hang to Dry
• Enjoy the simplicity of this solid color sleeve shirt and express your fashion style.
• Our Shirts are Slim Fit. So If You want to loose fit, You Had Better Order One Step Bigger Size than Your Original Size. And You can mix and match These Button Down Shirts with so many Formal Trousers and Stylish Denim Pants for the Daily and Office look.
• Printed button down shirt
• Great for dailywear and also as neat uniform.

Machine Wash Cold, No Tumble Dry; Hand Wash, Hang to Dry