# GKTZ COS Black Cat Costume Onesie, Size S, Flannel with Cat Ears and Tail

GKTZ COS black cat costume pairs a flannel onesie, cat ears, claws, and tail for Halloween trick-or-treating and dress-up.

- [Original product page](https://www.ofertitastop.com/us/product/gktz-cos-black-cat-costume-onesie)
- [View offer](https://www.ofertitastop.com/us/visit/gktz-cos-black-cat-costume-onesie)
- Market: US
- Language: en-US
- Currency: USD
- Product updated: 2026-10-24T02:12:36.544Z
- Brand: GKTZ
- Model: COS
- SKU: ofertitastop-us-160065
- Category: Apparel & Accessories > Costumes & Accessories > Costumes
- Source store: amazon US
- Active deal: Yes
- Price: 21.59 USD
- Previous price: 29.99 USD
- Discount: 28%
- Rating: 4.3 / 5
- Reviews: 131

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## Description

Made from soft flannel, the GKTZ COS black cat costume is a one-piece outfit designed for dress-up, with cat ears, claws, and a long tail attached at the back. A loose fit and elastic cuffs support comfortable movement, while the hood and warm fabric add a cozy touch for cool-weather events.

For a coordinated cat look without assembling separate costume pieces, this onesie brings its playful details together in one outfit. Front and back zippers make it easier to put on and take off, and side pockets offer a handy spot for candy or small treasures.

## How to use it

Use the cat onesie for Halloween trick-or-treating, parties, school plays, stage performances, or imaginative play at home. The cat ears, claws, and tail give the outfit its animal character, while the loose cut and elastic cuffs help kids move during play. The pockets are useful for carrying small finds along the way. For a quieter day at home, the costume can also serve as cozy loungewear.

The front and back zippers are designed to make changing straightforward. The hood adds to the cat-inspired look and provides an extra layer of warmth when the weather is chilly. For size S, compare your child’s measurements with the listed garment measurements and the size chart before choosing.

## Spec sheet

- Brand: GKTZ
- Model: COS
- Type: Black cat costume onesie
- Material: Flannel
- Size: S
- Recommended age: 6–7 years
- Recommended height: 43–47 inches
- Total length: 39.4 inches
- Chest circumference: 37 inches
- Sleeve length: 16.1 inches
- Hip circumference: 18.5 inches
- Design details: Cat ears, claws, attached tail, side pockets, elastic cuffs, front and back zippers

## Why it’s worth it

This costume suits families looking for a recognizable animal outfit that can move from a Halloween event to everyday pretend play. Compared with building a look from separate clothing and accessories, the one-piece design keeps the cat theme together, with ears, claws, and tail as part of the costume. Its flannel fabric and hood also make it a practical choice for cooler fall outings, while the pockets add a useful detail for trick-or-treating.

Customer feedback often highlights the costume’s softness, comfort, and warmth, as well as its suitability for Halloween. Fit feedback is mixed, with some buyers saying it runs a little large, so checking the size S measurements against the child’s measurements can help guide the choice.

## Before you decide

**What details give the costume its cat look?** The outfit features a hood with cat ears, cat claws, and a long tail attached at the back. Elastic cuffs and side pockets complete the onesie’s practical design.

**What are the size S measurements?** Size S is recommended for children ages 6–7 and heights of 43–47 inches. The listed measurements are 39.4 inches in total length, a 37-inch chest circumference, 16.1-inch sleeves, and an 18.5-inch hip circumference. Use the size chart alongside your child’s measurements when selecting a size.

**Can it be worn for occasions beyond Halloween?** Yes. The costume is also suited to birthday parties, Christmas dress-up, school plays, stage performances, animal-themed events, carnival role-play, and casual dress-up at home.

## Should you buy it?

Choose the GKTZ COS if you want a soft flannel cat onesie with recognizable costume details and practical pockets for outings or play. Its one-piece format works especially well for Halloween and other occasions when kids want an easy-to-wear animal look that can keep the fun going at home afterward.

## Images

![GKTZ COS Black Cat Costume Onesie, Size S, Flannel with Cat Ears and Tail — 1](https://www.ofertitastop.com/i/nQayFGhp7VLZSYnvhNHG7JndErq-e1IFigCnfATjFbuB0fqjcLETWn_c8_xq4tn4o-yDNRTPu3ccEiW3bYIa_emysc3CURc72XxZBHydylSoIiGP58NMqmRM1w.jpg)

![GKTZ COS Black Cat Costume Onesie, Size S, Flannel with Cat Ears and Tail — 2](https://www.ofertitastop.com/i/yG247W49xBfaESJGcxLsgXsJQuowG-0ZLYrp3vH7DmRyh4hb795VAJNH9TqyG0uXts6WhM9QgcUjsSm5_Imq_Jf-TdcK07_Oeqv0g6Dq5wci8UQ7IM0G3ekWaQ.jpg)

![GKTZ COS Black Cat Costume Onesie, Size S, Flannel with Cat Ears and Tail — 3](https://www.ofertitastop.com/i/te76KwsJY6TrCRk9M_gpt8JpwypWoB1cPbnttB_g0fBelfty3sKCRPdlcITIFZu4z4PURCPj7z8DHMV4TieVgdNo1YMWAaUpI_QCt8CoalIzRsdqK8M05p46-w.jpg)

![GKTZ COS Black Cat Costume Onesie, Size S, Flannel with Cat Ears and Tail — 4](https://www.ofertitastop.com/i/Wb4cXVZtQB1k_7FMfhoLs4RxyYSRF3NcqvZrAME6c3W0goFm9TFl-Wp-ljG89Sd9S5vDJKYZviTEy7IyIFdIjFpx6SOPia0pAj7qGK5fSeePfh0qcTaKWi9lkg.jpg)

![GKTZ COS Black Cat Costume Onesie, Size S, Flannel with Cat Ears and Tail — 5](https://www.ofertitastop.com/i/6ZK-9fLA8KyrPi3lX6ha-h4E6ZfuBxrh1pkLpx0gS6COEnD3A3DEzDEbjidtaAtoxqe0v-U96QIkWGf4-vY7cpfS0aEUMIVjZennjfjyrz8Fh1F4TSedZcih5A.jpg)