Cat Muscle Arms Halloween Costume for Cats and Dogs

She walks into the kitchen and the whole family stops talking. Slip it on and your cat becomes the most intimidating thing in the room, for exactly as long as it takes to get the photo.

These cat muscle arms are a 3D printed photo prop that slips over the neck like a collar. The oversized arms hang at the sides and swing as she walks, which is what sells the illusion, and the whole thing weighs almost nothing.

Where it actually gets used:

• Photos and short videos: the arms swing as she moves, which is what makes a two-second clip work
• Halloween and birthdays: a costume that goes on in one movement and comes off just as fast
• Small dogs too: the collar loop fits most adult cats and small breeds
• A gift that lands: a small present that gets a far bigger reaction than a card
• No clips or buckles: the loop goes over the head, so there's nothing to fasten while she wriggles

It's a prop for a photo session, not something to leave on. Instant superhero mode, easy to wear, made for sharing.

Light enough that she still moves normally. The arms are printed in PLA and they're hollow rather than solid, so there's no heavy bulk hanging off her neck.

She can still walk and lie down in them, which is the difference between a prop you get one photo out of and one she tolerates long enough to get a good one.

Six colors, one very silly idea. Green, yellow, skin color, gray, black and white. Skin color reads most like real arms in a photo.

Black and white are the ones that show up best against a light or dark coat, and the bright colors are the ones that read at thumbnail size on a phone.

Specifications

• Material: Ultralight PLA, hollow printed
• Size: 6.8 in (17.2 cm) high x 6.4 in (16.2 cm) wide, arm depth 3.4 to 3.5 in (8.6 to 8.8 cm)
• Fit: Collar-style loop, fits most adult cats and small dogs
• Colors: Green, Yellow, Skin Color, Gray, Black, White
• Use: Supervised photo sessions and short-term wear only
• Finish: Slight layer lines are normal on 3D printed parts

Safety note: This is a photo prop, not everyday wear. Stay with your pet the whole time it is on, and take it off as soon as she looks uncomfortable or tries to back out of it.

Never leave her alone or let her jump onto high shelves while wearing it.

Pick the color that stands out against her coat, get the photo, then take it off. Two minutes of flexing, and you'll be using that picture for years.