Fallout Vault Boy Different Personas 2016 Bethesda White T-Shirt Size Double Extra Large 2XL. Did you just wake up to find you're the only person left within your Vault. Then this handy Vault-Tec shirt with our favorite Vault Boy Mascot will definitely give you some company. Shirt is in very good overall condition. Does have some slight wear due to its former owner. Shirt comes from a rad free some free home. Measurements: Pit To Pit 25”, and length 25”. Is a 2XL. However, it fits more like a small Extra large, or large size shirt.