This is slim fit suit jacket, please choose the right size based on your chest measurement from the size options. If your chest is 44 inches then please choose size 44 This mens blazer designed with a modern slim fit, this clothing will flatter any man’s body and suitable for daily casual wear, work, business, party, wedding, club, birthday party and any celebration You don’t have to spend much time thinking of how to wear our blazer jacket, since it’s match with T-shirt,shirt and pants, which is also a wonderful choice for prom and new year, red, white, black, purple, blue, navy, yellow, gray, burgendy, green, sea blue and royal blue many colors for selection The single-breasted 1 button dinner jacket is fully lined and has 2 functional breast pockets, 1 interior and 1 exterior This sport coat jacket have extra small size for boys prom homecoming and graduation season Men's Slim Fit One Button Blazer Size 30 fit for body chest 30 inches, shoulder 14.8 inches, chest 34.6 inches, sleeve length 24.0 inches, clothing length 25.2 inches. Size 32 fit for body chest 32 inches shoulder 15.4 inches chest 36.2 inches sleeve length 24.4 inches clothing length 25.6 inches Size 34 fit for body chest 34 inches shoulder 16.3 inches chest 37.8 inches sleeve length 24.8 inches clothing length 26.4 inches Size 36 fit for body chest 36 inches, shoulder 16.9 inches, chest 39.4 inches, sleeve length 25.2 inches, clothing length 27.2 inches. Size 38 fit for body chest 38 inches, shoulder 17.3 inches, chest 40.9 inches, sleeve length 25.6 inches, clothing length 28.1 inches. Size 40 fit for body chest 40 inches, shoulder 17.7 inches, chest 42.5 inches, sleeve length 26.0 inches, clothing length 28.7 inches. Size 42 fit for body chest 42 inches, shoulder 18.5 inches, chest 44.8 inches, sleeve length 26.4 inches, clothing length 29.9 inches. Size 44 fit for body chest 44 inches, shoulder 19.3 inches, chest 46.6 inches, sleeve length 26.8 inches, clothing length 30.3 inches. This blazer is easy to handle and meets the requirements of comfort, quality and a distinct personality. MOGU, is your best choice!