Royal Robbins

Men's Sizing Chart for Apparel
  Small Medium Large X Large XX Large
Size/Waist 30 32 33 34 36 38 40 42 44
Collar 14½ 15½ 16½ 17½ 18½
Chest 36 40 44 48 52
Sleeve 33 34 35 36 37
Inseam Inseam varies by style; see garment description
All measurements are in inches and refer to body size, not garment dimensions.