TM 10-8400-201-23 3-12.  REPAIR AND MAINTENANCE-Continued Table 3-4.  Jacket, Flyer's, Llghtweight-Continued Sizing Instructions and Finished Measurements (in Inches) -SHORT REGULAR LONG Back Length (see note #2) X-Small 21 1/2 22 1/2 23 1/2 Small 22 23 24 Medium 22 1/2 23 1/2 24 1/2 Large 23 24 25 X-Large 23 1/2 24 1/2 25 1/2 Sleeve Length (see note #3) X-Small 14 1/4 15 1/4 16 1/4 Small 14 1/4 15 1/4 16 1/4 Medium 14 1/4 15 1/4 16 1/4 Large 14 1/4 15 1/4 16 1/4 X-Large 14 1/4 15 1/4 16 1/4 Note #1.  Half Chest - Jacket front closed, at base of armhole from folded edge to folded edge.  ±  3/4 in.  tolerance. Note #2.  Back Length - At center back, from collar joining seam to top of knit waistband.  ±  3/4 In tolerance. Note #3.  Sleeve Length - From armhole along underarm seam to top of cuff.  ± 3/4 in tolerance 3-18