Searching for paw-sitively purr-fect ways to get your pets involved in the fright night fun this year? Look no further than our spook-tacular selection of pet Halloween costumes!

From the creepy to the cute, the adorable to the abominable, we’ve got something for every four-legged friend at OnBuy - you can even pick up a matching ‘fit for yourself while you’re here!

Not too sure which one to choose? We’ve picked out some of our most popular pet Halloween costumes for 2021 to lend a helping hand (or should we say paw?)...

Awesome Halloween costumes for paw-some pooches

costumes for dogs

Throwing a Howl-oween party? Off on a Trick or Treat adventure with your pup? Make sure they’re dressed for the occasion with our selection of dog Halloween costumes!

The daring dino

dinosaur dog costume

Wonderfully comfy for your precious pooch, this a-roar-able Halloween costume is made out of soft polyester and comes complete with a dinosaur-style headpiece and shirt. Available in several different sizes to suit a selection of breeds and designed for easy step-in fastening, it’s the ultimate outfit for fearsome little personalities. 

Finished with arms and a tail, this larger-than-life dog Halloween costume is sure to be a hit with both you and your prehistoric pup!

The spooky spider

spider dog costume

Love ‘em or hate ‘em, spiders are seriously spooky - and this dog Halloween costume is sure to cause a scare! With bulbous red eyes and long, hairy legs that have a life of their own, this outfit really puts the creepy in creepy-crawly! Available in a huge variety of sizes, you can get them involved in the fancy dress fun this year, no matter the size, breed, or age of your dog. 

Featuring secure velcro fastening, this costume is ideal for even the most playful of pups!

The pretty pumpkin

dog pumpkin jumper

An iconic option for smaller pups and pooches, this pumpkin pet costume is bound to get you both in the spooky spirit! Featuring a friendly pumpkin face on the back and a striking orange turtleneck, this vibrant Halloween sweatshirt is just too cute to miss. If your pup simply can’t stay still, don’t worry; thanks to the pullover design, it’s effortlessly easy to put on and take off.

Robust and flexible, it's perfect for pets that enjoy a bit of rough outdoor play!

Halloween outfits for fearsome felines

costumes for cats

Of course, we couldn’t do a guide about pet costumes and forget about cats! Whether they’re a cat about town or they prefer to snuggle on the sofa, we’ve got something to suit every purr-fect personality among our range of cat Halloween costumes!

The bewitched kitten

witch cat costume

Create a creepy cat look that’s guaranteed to enchant your guests with this bewitched kitty costume - with the option of buying just the cloak, pointed witches hat, or both pieces! Made from breathable material, this cloak and hat combo features a striking red trim and brass bell on the top of the pointy hat. 

With this costume, your cat could look just as happy as the one in the photo(!)

The kooky bat

bat cat costume

Simple yet stylish, this sleek bat costume is perfect for excitable cats and kittens that are always flitting around the house. The material itself is soft felt cloth that’s great for ensuring the costume is non-irritating when worn against your feline’s fur. 

Easy to secure around the neck like a collar, it’s a fuss-free option with fearsome results!

The loyal lion

lion cat costume

Purr-fect for particularly regal felines who rule the roost, this lion mane is sure to make them feel like the king of the jungle! Featuring an adjustable elastic band and lightweight by design, this adorable accessory can be worn comfortably all night long by cats of all shapes and sizes.

Want to know what Halloween costume suits your pet’s personality? Take the quiz!

cats and dogs in costumes

Just like us, your pet’s preferences say a lot about their style! Take our quiz to find out which of our pet Halloween costumes will complement their paw-some personality the best!


Once you’ve found the right outfit for your four-legged friend, head on over to our Halloween collection to find everything you need to make this spooky season one to remember. From matching costumes to devilishly good decorations, party essentials to Trick or Treat goodies, we’ve got you covered whatever your plans for Halloween this year may be!

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