Old Navy Matching Halloween Graphic One-Piece Pajamas Even if you haven't yet settled on an actual costume, it can't hurt to pick up a pair of glow-in-the-dark or Day of the Dead Old Navy Matching Halloween Graphic One-Piece Pajamas ($40) — especially if you need petite sizes which are already selling fast. Image Source: oldnavy.gap.com Old Navy Matching Halloween Graphic One-Piece Pajamas $40 from oldnavy.gap.com Buy Now