Halloween Costumes

At SillySanta you'll find over 30 halloween costumes – also known as halloween costume or fancy dress – for women, men and kids, rated 4.9 out of 5 from over 400 reviews. Dress up the whole family for the spookiest night of the year! From the Kids' Skeleton Onesie to the Monster and Devil onesies, there's a fun look for everyone right here in our collection.

Match the Whole Family in Halloween Costumes

This is the home base for our whole onesie range, which means it's the easy place to put a group look together. Most styles come in women's, men's and kids' versions, so a family of four can all turn up as monsters, or a couple can go matching while the little ones pick their own creatures.

There are two ways people usually play it. The first is one theme for everyone: a row of skeletons on the doorstep, or a den full of devils on movie night. The second is one standout style each, where everyone keeps their own personality but the photo still hangs together. Either works, and because the sizing runs the same way across ages, coordinating is mostly just choosing a color or creature you all like.

To build a set, browse by who you're dressing. Start with womens halloween costumes for her, add mens halloween costumes for him, and finish with kids halloween costumes for the smaller members of the household. Each page shows that audience's fit and the styles cut for them.

Top 10 Halloween Costumes

Our most popular costume onesies for dressing up with zero fuss.

A Tour of the Themes

The range leans into the classics and a few cheeky surprises. Skeletons are the obvious crowd-pleaser, and several styles glow in the dark, so a kids' skeleton onesie genuinely lights up the street on a dark October evening. Devils and monsters cover the properly spooky end, with horns, claws and friendly-scary faces that read well in a group shot.

From there it softens. Unicorns and dinosaurs are the gateway costumes for anyone who wants the dressing-up without the fright, and the brown and pink teddy bears are about as cozy as a costume gets. For something with a wink to it, the prisoner onesie comes with a STATE PRISON print and a writable mugshot board, which is reliably the most photographed outfit at any party.

Because the onesies are the whole story here, the breadth comes from theme and age rather than a hundred different product types. That keeps the collection focused: a curated set of dress-up ideas you can actually decide between, not an overwhelming wall of options to scroll past.

Comfy Halloween Costumes Beat Scratchy Fancy Dress

The reason these win on the night is simple. A soft fleece onesie is warm enough to stand around outside trick-or-treating, with none of the scratchy fabric, fiddly fastenings or restrictive shapes that come with traditional fancy dress. You pull it on over your clothes, zip up, and you're done, which matters most when you're trying to get excited kids out the door.

Fabrics vary by style, so you'll find soft polyester fleece on some and a cozy cotton mix on others, but the feel across the range is the same: light, stretchy and made to move in. That comfort is the difference between a costume that gets worn for twenty minutes and one that's still on during the late-night horror film.

Sizing and Care

Fit is regular across the collection, so order your usual size and you'll be right. If you're between two sizes, size up, the extra room sits comfortably over normal clothes and leaves space to layer when it's cold. Model height references on the product pages help too, for example a 170 cm model wears a size S, and a 136 cm child wears the 8 to 10 Years.

Looking after them is low effort. Machine wash gentle at a maximum of 30°, turn the onesie inside out, and wash with similar colors. Skip the bleach, the iron and the dry cleaner, and check the individual item for whether it's safe to tumble dry.

Delivery in Time for Halloween

We ship from within the EU, which keeps delivery reliable and reasonably quick for European shoppers ordering ahead of Halloween night. Order with a little time to spare and your costumes should land well before the 31st, ready for the doorstep, the party or the family photo.