How do I make a DIY Slimer costume?

You can create a DIY version by sewing a large, pear-shaped tunic out of neon-green felt, stuffing it with polyester fiberfill or bubble wrap to create rolls, and gluing on felt pieces for the eyes, teeth, and tongue.

What should I wear under an inflatable Slimer costume?

Wear thin, moisture-wicking clothes like a t-shirt and shorts, as the plastic material of inflatable suits can trap heat quickly.

Is the Slimer costume easy to walk in?

Yes, most commercial Slimer tunics and inflatable suits leave your legs completely free, making it easy to walk, though navigating tight spaces can be tricky due to the wide width.

A simple green dog sweater with felt eyes and a pink tongue attached to the back.

AI-generated example

Slimer Costume

Unleash your inner green ghost and get ready to slime everyone.

Slimer is the gluttonous, bright green ghost from the Ghostbusters franchise who loves to haunt hotels and devour hot dogs. People choose this costume for its hilarious, nostalgic appeal and crowd-pleasing humor. The look centers around a rotund, neon-green body shape with a wide, toothy mouth and a long pink tongue.

Difficulty: Medium
Time: ~30 min
Budget: $40–100

See yourself as Slimer →What you need Buy the Slimer costume

Try it on

See yourself as Slimer

One clear photo of yourself; we render you in this costume — face untouched, full body, about 20 seconds.

Choose or drop a photo of yourselfJPG · PNG · HEIC

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.

Slimer costume — Example look · AI-generated

You as Slimer

Result

What you need for a Slimer costume

Short on time? Buy it ready-made

Spirit Halloween sells the complete Slimer costume — one box instead of 5 pieces.

Shop Slimer at Spirit ↗

Green inflatable or padded tunic
A bright neon-green, oversized tunic or inflatable suit that mimics Slimer's round, rolls-of-fat silhouette.
DIY: Sew two large pieces of neon green felt together in a pear shape, stuffing the inside with batting or bubble wrap for volume.
Amazon
Green morph mask or face paint
A lime green face mask, mesh screen, or vibrant green face paint to blend your face into the costume.
DIY: Use a mix of green and yellow cream face paint to cover your exposed face and neck.
Amazon
Green tights or leggings
Bright green leggings or tights to wear underneath the tunic to keep your legs matching the ghost body.
DIY: Wear any dark green or black sweatpants you already own to keep the focus on the upper body.
Amazon
Green long-sleeve shirt
A matching neon-green long-sleeve undershirt to cover your arms under the tunic.
DIY: Use a plain green long-sleeve tee or dye an old white shirt with bright green fabric dye.
Amazon
Fake hot dogs prop
A plastic or foam bunch of hot dogs to carry around, showcasing Slimer's legendary appetite.
DIY: Craft simple hot dogs out of brown and tan felt or polymer clay.
Amazon

Rather not assemble it? See ready-made Slimer costumes at Spirit Halloween ↗

How to put it together

1
Put on the neon-green long-sleeve shirt and matching green leggings or tights as your base layer.
2
Step into the padded or inflatable Slimer tunic, pulling it up over your torso.
3
If using an inflatable version, turn on the battery-operated fan and wait for the suit to fully expand.
4
Adjust the hood so that Slimer's face sits comfortably above yours, ensuring the mesh screen or face opening is aligned.
5
Apply green face paint to any exposed skin around your eyes and neck if you are not using a full face mask.
6
Pick up your fake hot dogs or food props to complete the greedy ghost look.

Makeup & hair

If your face is visible, apply vibrant lime-green face paint across your entire face and neck. Use dark green eyeshadow around your eyes to add depth, and paint your lips a dark forest green to match the monstrous mouth.

Slimer for couples, groups, kids & more

couples: Pair up with someone dressed as a classic Ghostbuster in a tan flight suit carrying a proton pack.
group: Form a team with a Ghostbuster, the Stay Puft Marshmallow Man, and Gozer for a complete franchise group.
kids: A plush, padded green bubble jumpsuit with an attached hood makes an adorable toddler version.
Plus size: Inflatable Slimer suits are naturally roomy and offer a comfortable, one-size-fits-most fit.
pet: A simple green dog sweater with felt eyes and a pink tongue attached to the back.

More ways people search for this costume

The most-searched variations of “Slimer costume”, and how this look adapts to each.

Slimer dog costume: A simple green dog sweater with felt eyes and a pink tongue attached to the back.

Tips

If using an inflatable costume, bring extra AA batteries to ensure your fan stays powered all night.
Wear lightweight, breathable clothing underneath the padded tunic to prevent overheating.
Keep your hands free for snacks by choosing a tunic with arm slits or removable gloves.
Practice a wide-eyed, hungry expression for photos while holding your food props.

Slimer costume FAQ

How do I make a DIY Slimer costume?: You can create a DIY version by sewing a large, pear-shaped tunic out of neon-green felt, stuffing it with polyester fiberfill or bubble wrap to create rolls, and gluing on felt pieces for the eyes, teeth, and tongue.
What should I wear under an inflatable Slimer costume?: Wear thin, moisture-wicking clothes like a t-shirt and shorts, as the plastic material of inflatable suits can trap heat quickly.
Is the Slimer costume easy to walk in?: Yes, most commercial Slimer tunics and inflatable suits leave your legs completely free, making it easy to walk, though navigating tight spaces can be tricky due to the wide width.

Did you know? Slimer was originally referred to simply as 'The Onionhead Ghost' on set, and was only officially named 'Slimer' in the 1986 animated series, The Real Ghostbusters.