Size Chart Runs Small Slightly Small True To Size Slightly Large Runs Large XS S M L XL 2XL Size Measurement Standard Metric X-Small Shirt Chest 29 1/2" 75cm X-Small Sleeve Length 16 1/4" 41cm X-Small Shirt Length 19 1/2" 50cm X-Small Vest Chest 26 1/2" 67cm X-Small Vest Length (front) 26" 66cm X-Small Vest Length (back) 15 1/2" 39cm X-Small Pants Waist 20 1/2" - 22 1/2" 52cm - 57cm X-Small Inseam 7" 18cm X-Small Child Size 5-6 5-6 Size Measurement Standard Metric Small Shirt Chest 31 1/2" 80cm Small Sleeve Length 19" 48cm Small Shirt Length 20 1/2" 52cm Small Vest Chest 28 1/2" 72cm Small Vest Length (front) 27" 69cm Small Vest Length (back) 16 1/2" 42cm Small Pants Waist 21 1/2" - 23 1/2" 55cm - 60cm Small Inseam 9" 23cm Small Child Size 7-8 7-8 Size Measurement Standard Metric Medium Shirt Chest 34 1/2" 88cm Medium Sleeve Length 21" 53cm Medium Shirt Length 21 1/2" 55cm Medium Vest Chest 31 1/2" 80cm Medium Vest Length (front) 28" 71cm Medium Vest Length (back) 17 1/2" 44cm Medium Pants Waist 23" - 25" 58cm - 64cm Medium Inseam 13" 33cm Medium Child Size 10-12 10-12 Size Measurement Standard Metric Large Shirt Chest 36" 91cm Large Sleeve Length 23" 58cm Large Shirt Length 23 1/2" 60cm Large Vest Chest 33" 84cm Large Vest Length (front) 30" 76cm Large Vest Length (back) 19 1/2" 50cm Large Pants Waist 25" - 27" 64cm - 69cm Large Inseam 17" 43cm Large Child Size 14 14 Size Measurement Standard Metric X-Large Shirt Chest 37 1/2" 95cm X-Large Sleeve Length 24" 61cm X-Large Shirt Length 24 1/2" 62cm X-Large Vest Chest 34 1/2" 88cm X-Large Vest Length (front) 31" 79cm X-Large Vest Length (back) 20 1/2" 52cm X-Large Pants Waist 26" - 28" 66cm - 71cm X-Large Inseam 18 1/2" 47cm X-Large Child Size 16 16 Size Measurement Standard Metric 2X-Large Shirt Chest 39 1/2" 100cm 2X-Large Sleeve Length 25" 64cm 2X-Large Shirt Length 25 1/2" 65cm 2X-Large Vest Chest 36 1/2" 93cm 2X-Large Vest Length (front) 32" 81cm 2X-Large Vest Length (back) 21 1/2" 55cm 2X-Large Pants Waist 28" - 30" 71cm - 76cm 2X-Large Inseam 20" 51cm 2X-Large Child Size 18 18 Inches Centimeters Costume Sizing Tips