HalloweenCostumes is the largest online-only retailer of costumes in the world. With over 10,000 costumes and 3,500 exclusives, we have awesome products you won’t find anywhere else. Sounds great, right? Believe it or not, there’s even more to it than that! We have many costumes, but the number isn’t what matters. What matters is that we make and carry all 10,000 costumes and accessories to be inclusive.