If you’re after a classic letter B costume, perhaps even one that you already own, you can’t go wrong with a Batman costume. You too can be the masked savior of Gotham City in one of our many different styles of Batman costumes - sure to make you ready to serve justice at your next letter B costume party.

Staying on the theme of superhero costumes starting with the letter B, another great letter B costume idea is Black Widow from the Avengers. Black Widow, aka Natasha Romanoff, is one of the most talented spies and assassins in the world, making her a fearful yet fantastic letter B costume idea.

If you’re after a couple's letter B costume idea, you can’t go wrong with Beauty and the Beast. Within our Beauty and the Beast costume collection, you’ll find all the beautiful yellow flowing dresses for Belle and suits and masks for Beast, ensuring you’ll be the best dressed couple at the letter B costume party.

There’s nothing more adorable than a bunny, so why not dress as one for your letter B costume party. The bunny costume can be taken one of two ways - you could either opt for a cute fluffy bunny costume or a sexy Playboy bunny inspired costume. Either way, you’ll be able to find costumes for both bunnies here at CostumeBox.

Why not dress as the famous Tim Burton character, Beetlejuice, as your next costume starting with the letter B. The 1988 film ‘Beetlejuice’ tells the story of a deceased couple that unsuccessfully tries to scare away the family that has moved into their house, eventually calling on the help of bio-exorcist ‘Betelgeuse’. We have plenty of Beetlejuice costumes for both men and women so there’s sure to be something ghostly good for everyone.

Black Panther is without a doubt one of Marvel’s most loved characters, with the movie being one of the biggest films of 2018 coupled with everyone’s love of its late actor Chadwick Boseman. It is for this reason that a Black Panther costume would make for a great costume starting with B. Browse our Black Panther costume collection now to find yours and protect Wakanda.

If you’re in the mood for a slow-motion run along the beach, then a Baywatch costume would be the perfect letter B costume idea. Baywatch ran from 1989 to 1999 and followed the lives of lifeguards in Los Angeles and Hawaii, starring the likes of Pamela Anderson and David Hasselhoff. Grab your life float and red swimsuit and recreate this iconic 90s letter B costume today.