Siren Costume
Channel the haunting beauty of the ocean's most alluring mythical creature.
The siren is a captivating and dark mythological figure, blending the beauty of a mermaid with a dangerous, haunting edge. People choose this look to stand out from classic mermaids with a more gothic, mysterious aesthetic. The costume features deep ocean tones, iridescent scales, aquatic accessories, and dramatic makeup.
- Difficulty
- Medium
- Time
- ~60 min
- Budget
- $35–95
Try it on
See yourself as Siren
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 Siren costume
Short on time? Buy it ready-made
Spirit Halloween sells the complete Siren costume — one box instead of 5 pieces.
Dark scale top
A black, deep green, or iridescent purple bralette or corset embellished with faux seashells or scale patterns.
DIY: Glue faux seaweed and dark-painted seashells onto an old black strapless bra.
Siren skirt or tail pants
A form-fitting maxi skirt with a flared fishtail hemline in dark teal, emerald, or black sequins.
DIY: Wrap a shimmering dark green or blue sarong tightly around your hips, letting it drape to the floor.
Fishnet overlay
A black or green fishnet top or body stocking worn underneath to mimic the texture of fishing nets.
DIY: Cut up a pair of old fishnet tights to wear as sleeves or a waist wrap.
Sea shell crown
A headband adorned with dark-painted shells, faux pearls, and sprigs of black seaweed.
DIY: Hot glue plastic shells and faux pearls onto a plain black plastic headband.
Trident prop
A dark silver or black trident with a weathered, barnacle-encrusted finish.
DIY: Paint a plastic toy trident with black and metallic silver acrylic paint, then glue on faux moss.
Rather not assemble it? See ready-made Siren costumes at Spirit Halloween ↗
How to put it together
- 1
Put on the fishnet body stocking or fishnet sleeves as your base layer.
- 2
Secure the dark scale corset or embellished top over the fishnets.
- 3
Slip into the sequined fishtail skirt, ensuring it sits comfortably on your waist and flares at the bottom.
- 4
Place the shell crown securely on your head, using bobby pins if needed to keep it in place.
- 5
Drape faux seaweed or netting over your shoulders for added texture.
- 6
Carry your weathered dark trident to complete the powerful, mythical look.
Makeup & hair
Create wet-look hair using gel or sea salt spray, styled in messy waves. For makeup, use iridescent blue and green eyeshadows, dark lipstick, and apply fishnet-patterned scales to your cheekbones using a stencil.
Siren for couples, groups, kids & more
- couples
- Pair with a shipwrecked sailor or a weathered pirate captain.
- group
- Gather a group of sirens, each representing a different ocean depth (e.g., shallow reef, deep abyssal zone).
- kids
- A kid-friendly version features a glittery teal mermaid dress with a soft felt shell crown.
- Plus size
- A high-waisted sequin maxi skirt paired with a supportive, structured dark corset offers a flattering, comfortable fit.
- pet
- A simple green ruffled collar resembling seaweed for a dog or cat.
Tips
- Since fishtail skirts can restrict your stride, choose one with a stretchy fabric or a side slit for easier walking.
- Bring a light shawl or wrap styled like a fishing net to keep warm during chilly evening events.
- For photos, pose near water or under cool, blue-toned lighting to enhance the deep-sea atmosphere.
Siren costume FAQ
- What is the difference between a mermaid and a siren costume?
- While mermaids are often bright and whimsical, sirens have a darker, more gothic aesthetic featuring deep ocean colors, weathered textures, and haunting makeup.
- How do I make DIY scales for my makeup?
- Hold a clean fishnet stocking tightly over your face, then brush shimmering green, blue, or silver eyeshadow over the mesh to leave a scale pattern on your skin.
- What shoes should I wear with a siren costume?
- Opt for comfortable black flats, dark sandals, or boots, as your feet will mostly be hidden beneath the long fishtail skirt.
Did you know? In ancient Greek mythology, sirens were originally depicted as half-bird, half-woman creatures, but over centuries of folklore, they evolved into the half-fish mermaids we associate with the legend today.