This is a gorgeous sport coat from Brooks Brothers.

Made of a luxurious lightweight blend of cotton and silk , it's dark gray with a light gray pinstripe. 

It's a Regent fit, which is BB's classic fit.

The jacket features a two-button front, dual rear vents, natural shoulders, and front flap pockets. 

This jacket is NEW, without tags.  It is guaranteed to be authentic and absolutely perfect.

• LABEL: Brooks Brothers 1818
• COLOR: Dark Gray With Light Stripe
• MATERIAL: Cotton & Silk Blend
• FRONT BUTTONS: Two Buttons
• CUFF BUTTONS: Four Buttons
• FRONT POCKET TYPE: Flap Pockets 
• INTERIOR POCKETS: Two Pockets
• VENT: Dual Rear Vents
• LINING: No Lining
• TAG SIZE: 40S (US)
• SHOULDER SEAM TO SHOULDER SEAM: 18 Inches
• ARMPIT TO ARMPIT: 22 Inches 
• WAIST ACROSS TOP BUTTON: 20 Inches 
• COLLAR SEAM TO BOTTOM OF BACK: 29.5 Inches 
• SHOULDER SEAM TO END OF CUFF: 24 Inches 
• CONDITION: NEW
• COMMENTS: Gorgeous jacket!

All measurements done across the back with the jacket laid flat. 

Compare my measurements with a jacket you have that fits you well. Even new and unworn items may have been altered. You will NOT be disappointed.