COW Costume 3T 4T 36-48 Months 4 Piece Black White Infant Toddler 4-Piece Dylan the Cow Halloween Costume. Size 36-48 Months. Fits: height: 39"-42", weight: 34-37 lbs. 4-piece cow costume. Approx. 9" zipper at back with velcro closure at collar. The cutest costume! Roomy enough to wear clothing underneath for added warmth if needed.