Finn and Jake Costume
Grab your sword and your best friend for an mathematical adventure.
Finn the Human and Jake the Dog from Adventure Time are the ultimate duo for friends, couples, or siblings looking for a nostalgic and fun costume. Finn's look is defined by his signature white bear-eared hat and blue outfit, while Jake is instantly recognizable by his bright yellow color and large cartoon eyes. Together, these outfits are comfortable, highly recognizable, and incredibly easy to put together.
- Difficulty
- Easy
- Time
- ~30 min
- Budget
- $30–80
Try it on
See yourself as Finn and Jake
One clear photo of yourself; we render you in this costume — face untouched, full body, about 20 seconds.
One render, $1. No account needed — if it fails you're not charged. Pricing.
Your photo is sent to Google's Gemini API to make the render and isn't used for training. Renders are AI-generated and labelled.
Want a different costume on this photo, or a whole group in costume? Open the Try-On Studio.
What you need for a Finn and Jake costume
Short on time? Buy it ready-made
Spirit Halloween sells the complete Finn and Jake costume — one box instead of 6 pieces.
Finn's White Fleece Hat
A white fleece hood or beanie with two distinct rounded bear-like ears on top that straps under the chin.
DIY: Sew two rounded fleece ears onto a plain white fleece aviator hat or hood.
Light Blue T-Shirt
A simple, solid light blue short-sleeved crewneck t-shirt.
Dark Blue Shorts
Solid dark blue or royal blue comfortable shorts.
Green Backpack
A two-tone green circular backpack, featuring a light green body and a dark green outer pocket.
DIY: Fabric paint a standard green backpack to have a two-tone circular look, or use green felt sheets to cover an old backpack.
Finn's Golden Sword
A toy golden sword with a black hilt and a red gem on the pommel.
DIY: Cut the sword shape out of sturdy cardboard, paint the blade gold, the guard black, and add a red plastic gem to the bottom.
Jake the Dog Plush or Hoodie
A bright yellow hoodie with Jake's large black-and-white eyes and black snout printed on the front, or a large Jake plush toy to carry.
DIY: Fabric paint Jake's signature jowl, black nose, and large white-and-black eyes onto a plain bright yellow hooded sweatshirt.
Rather not assemble it? See ready-made Finn and Jake costumes at Spirit Halloween ↗
How to put it together
- 1
Put on the light blue t-shirt and tuck it neatly into the dark blue shorts.
- 2
Pull on white crew socks and pair them with simple black sneakers or slip-ons.
- 3
Fasten the white fleece Finn hat over your head, securing it under your chin if it has a strap, ensuring your hair is fully tucked inside.
- 4
Strap on the two-tone green backpack over your shoulders.
- 5
Carry the golden toy sword in your hand or slide it securely into the side of your backpack.
- 6
For the Jake partner, put on the bright yellow Jake hoodie or carry the Jake plush toy to complete the iconic duo look.
Makeup & hair
Finn's hair is completely hidden under his white hat, so no hairstyling is needed. Keep makeup minimal and clean to match the simple, bright cartoon aesthetic of the show.
Finn and Jake for couples, groups, kids & more
- couples
- One person dresses as Finn with the blue outfit and white hat, while the other wears an all-yellow outfit with Jake's face printed on the shirt.
- group
- Expand the group with friends dressing as Princess Bubblegum in pink, Marceline the Vampire Queen with a red bass guitar, and Ice King with a blue robe and crown.
- kids
- A highly comfortable option for kids using a soft fleece Finn hat, a blue t-shirt, and a lightweight foam sword for safety.
- Plus size
- Both the light blue t-shirt and yellow Jake hoodie are easily sourced in comfortable, loose-fitting cotton and fleece sizes.
- pet
- Dress a pug or bulldog in a simple yellow dog tee to serve as the perfect real-life Jake the Dog.
Tips
- The backpack is fully functional, so use it to carry your wallet, keys, phone, and snacks while trick-or-treating or at a convention.
- If you are wearing the Finn hat indoors, choose a lightweight cotton or thin fleece version so you don't overheat.
- For photos, strike a heroic pose with the golden sword raised high in the air while your partner poses with a goofy, relaxed expression.
Did you know? Despite always wearing his white hat to hide it, Finn actually has incredibly long, beautiful, flowing golden-blonde hair that is revealed in several episodes.