Hollow Knight Costume
Embody the silent, vessel protagonist of Hallownest with this striking look.
The Knight from Hollow Knight is a highly popular cosplay choice due to its hauntingly beautiful, minimalist design. This costume captures the silent protagonist's iconic look, featuring a smooth white horned mask, a tattered dark cloak, and the signature flat sword known as a Nail. It is a perfect choice for gaming conventions, Halloween, and indie game fans looking to make a memorable impression.
- Difficulty
- Medium
- Time
- ~45 min
- Budget
- $40–120
Try it on
See yourself as Hollow Knight
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 Hollow Knight costume
Short on time? Buy it ready-made
Spirit Halloween sells the complete Hollow Knight costume — one box instead of 5 pieces.
White horned mask
A smooth, matte white full-head helmet or face mask featuring two upward-curving horns and large, hollow black almond-shaped eyes.
DIY: Cut the shape out of EVA foam or papier-mâché, sand it smooth, paint it matte white, and cover the eyeholes with black mesh fabric.
Tattered dark grey or purple cloak
A high-collar, tattered cloak or cape in a faded dark grey, navy blue, or deep purple fabric that drapes over the shoulders.
DIY: Drape a piece of dark grey jersey fabric over your shoulders, pin it at the neck, and use scissors to shred and fray the bottom hem.
Black bodysuit or base layers
A solid black long-sleeve shirt and matching black leggings or a full-body black morph suit to represent the Knight's void body.
DIY: Wear a fitted black long-sleeve tee and black skinny jeans or leggings from your closet.
The Nail (Sword)
A flat, tapered silver or grey prop sword with a simple wrapped hilt, designed to look like the Knight's signature weapon.
DIY: Cut the flat, tapered blade shape out of thick cardboard or EVA foam, reinforce it with a wooden dowel, and paint it metallic silver.
Black gloves
Simple, lightweight black stretch gloves to keep your hands completely dark and match the void body.
Rather not assemble it? See ready-made Hollow Knight costumes at Spirit Halloween ↗
How to put it together
- 1
Put on the black bodysuit or the black long-sleeve shirt and leggings to establish the dark void base layer.
- 2
Slip on the black gloves to ensure no skin is visible on your hands.
- 3
Drape the tattered dark grey cloak over your shoulders and secure it at the collar, letting it cover most of your torso.
- 4
Carefully put on the white horned mask, adjusting it so the black mesh eyeholes align with your eyes for visibility.
- 5
Pick up your prop Nail weapon to complete the iconic silhouette of the silent traveler.
Makeup & hair
No makeup or hair styling is required, as the full-head mask and black base layers completely conceal your head, hair, and face.
Hollow Knight for couples, groups, kids & more
- couples
- Pair up with Hornet, who wears a similar white mask with longer horns and a vibrant red cloak.
- group
- Form a Hallownest group with Hornet, Quirrel, and the False Knight.
- kids
- Use a lightweight, half-face plastic mask and a simple fleece poncho for a comfortable, kid-friendly version.
- Plus size
- A loose-fitting, oversized dark grey poncho or cloak provides a comfortable and screen-accurate drape over any body type.
Tips
- Ensure the black mesh in the mask's eyeholes is thin enough to see through clearly, especially in low-light Halloween settings.
- Keep the prop Nail lightweight by using foam or cardboard so it is easy to carry around a convention hall all day.
- Wear breathable black athletic wear underneath the cloak to prevent overheating while wearing the mask.
Hollow Knight costume FAQ
- How do you see out of the Hollow Knight mask?
- The mask's large black eyes are covered with a dark, breathable mesh fabric (like buckram or black pantyhose) that allows you to see out while keeping your face completely hidden.
- What is the Hollow Knight's weapon called?
- The weapon is called a 'Nail.' It is a flat, tapered, sword-like tool made of pale ore, which can be easily replicated using painted foam or cardboard.
- What color is the Hollow Knight's cloak?
- The cloak is traditionally a faded, tattered dark grey, though it can sometimes appear to have subtle dark blue or muted purple undertones depending on the game's lighting.
Did you know? The protagonist of Hollow Knight is actually referred to by fans and developers as 'The Knight' or 'Ghost,' while the title 'Hollow Knight' refers to a completely different boss character in the game's lore.