Check out other Christmas outfits and adult costumes like reindeer, snowman and even a Christmas tree. Christmas costume accessories are also available, so you can pair them with your choice of outfit. If you’re looking for stylish outfits for adults, find costume suits for men and dresses for women with winter-inspired prints. Fun World Red and White Plush Velour Santa Claus Unisex Adult Christmas Costume Suit - One Size. Fun World. $ reg $ Sold and shipped by Christmas Central. a Target Plus™ partner. Fun World Pink and White Santa's Little Helper Adult Women's Christmas Costume - Medium.