How To Choose Size---please choose the size based on your chest,size 44 = 44 blazer +29 pants.size 46 = 46 blazer +30 pants.size 48 = 48 blazer +32 pants.size 50 = 50 blazer +34 pants.size 52 = 52 blazer +36 pants.size 54 = 54 blazer +38 pants.size 56 = 56 blazer +40 pants.size 58 = 58 blazer +42 pants. Please check the size image for measurement detail. 2 Piece Suit---1* One Button Dress Suit Jacket+1* Slim Fitted Trousers.The men tuxedo suit is cut with 3D draping.When you wear it, you will become handsome, elegant and personable. Suitable Occasions---Ideal for formal and informal occasions such as wedding, business , daily life, fashion parties, prom ,groomsmen ,Halloween, Christmas, Easter, social gathering and holiday. The suit for men is also a perfect gift. Details of Design---Tux Jacket: One Button Closure, Single Breasted, Notch Lapel; Pants: Flat Front, Reagular Fit. The simple and elegant style makes this tuxedo suit not too fancy, and can also be worn in formal occasions. Care Instruction---Dry cleaning or hand-washing in cold water.