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 Small | Chest 34-36 Size Medium | Chest 38-40 Size Large | Chest 42-44 Size X-Large | Chest 46-48 Size XX-Large | Chest 50-52 Size XXX-Large | Chest 54-56 Size One Size | Chest 38-48 Item Color(s): This item"s color(s) may vary due to inherent variations manufacturing dye application or your computer monitor"s color settings.