Item Sizing : The size guide found below is specific to the costume in this listing. Other costumes may have different sizing patterns. For example, company A's size medium may be equivalent to company B's size large. Be sure to check the size chart closely to make sure you know what you are ordering. The list below may indicate that more than one size fits you. If you are unsure of which size to choose, then go with the larger size because these costumes may tend to run small. Measurements are stated in inches. Size X-Small | Chest 22-23 | Waist 21-21.5 | Height 39-42 | Age 3-4 yrs Size Small | Chest 23-25 | Waist 21-23 | Height 39-47 | Age 4-6 yrs Size Medium | Chest 26-27 | Waist 23-24 | Height 48-54 | Age 7-8 yrs Size Large | Chest 28-30 | Waist 24-25 | Height 54-58 | Age 9-10 yrs Size Large Plus | Chest 32-33.5 | Waist 29-30.5 | Height 54-58 | Age 9-12 yrs Size X-Large | Chest 30-32.5 | Waist 26-27 | Height 59-62 | Age 11-12 yrs Size One Size | Chest | Waist | Height | Age 4-12 Item Color(s) : This item's color(s) may vary due to inherent variations manufacturing dye application or your computer monitor's color settings.