Twin needle stitching and taped back neck. Lockstitched cuffs. Size Chest (to fit) S - 38" M - 40" L - 42" XL - 44" 2XL - 46/48" 3XL - 50/52" 4XL* - 54/56" 5XL* - 58/60" *Available in 4XL and 5XL