Up until Halloween 2010, there weren't a heck of a lot of Hello Kitty costume options available unless you were under 10 years of age. This year, the infamous "Hello Kitty Dress" is back, along with a new "Red Glitter" option, and a romper that threatens to ruin all all of my fond childhood memories of the iconic white cat.
On the other hand, if these costumes aren't appropriate for your school or office Halloween shindig, you can always throw on the Hello Kitty headband, smear on some face paint, and call it a day.
Hello Kitty Red Glitter Costume :// $45, Hot Topic
Women's Hello Kitty Romper Costume:// $54.99, Target
Hello Kitty Bow Headband:// $9.99, Party City