COSTUME INCLUDES: Shirt With Attached Arms, Headpiece OFFICIALLY LICENSED: Jurassic World T-Rex. THE RIGHT FIT: Pet size medium (11-20LBS), when deciding size, note costumes run smaller than apparel. Refer to the size chart and sizing video before choosing. Do not select size based on breed alone, as fit may vary. IMPORTANT DETAILS: T-Rex costume features a step in costume with tail and attached arms plus headpiece EVERY DAY IS AN OCCASION: Great for Halloween, themed parties, festivals, cosplay events, or anytime, because life is more fun in costume. COSTUME DESTINATION: Rubies aims to spark joy and creativity worldwide as your go-to destination for expertly crafted costumes, accessories, and all celebration needs