---
product_id: 570326943
title: "Sincere Party Blue Monster Onesie Costume for Kids,Soft Cozy Warm Animal Onesie for Unisex Kids"
brand: "sincere party"
price: "¥7602"
currency: JPY
in_stock: true
category: "Sincere Party"
url: https://www.desertcart.jp/products/570326943-sincere-party-blue-monster-onesie-costume-for-kids-soft-cozy
store_origin: JP
region: Japan
---

# Wide size range XS to 2XL Adorable embroidered monster face & horns Soft mid-weight fleece warmth Sincere Party Blue Monster Onesie Costume for Kids,Soft Cozy Warm Animal Onesie for Unisex Kids

**Brand:** sincere party
**Price:** ¥7602
**Availability:** ✅ In Stock

## Summary

> 👾 Unleash the fun with cozy monster vibes!

## Quick Answers

- **What is this?** Sincere Party Blue Monster Onesie Costume for Kids,Soft Cozy Warm Animal Onesie for Unisex Kids by sincere party
- **How much does it cost?** ¥7602 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/570326943-sincere-party-blue-monster-onesie-costume-for-kids-soft-cozy)

## Best For

- sincere party enthusiasts

## Why This Product

- Trusted sincere party brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Wear & Care:** Front zipper for easy dressing, machine washable for busy parents
- • **Playful Monster Design:** Cute embroidered face, padded tail, and detachable horns bring fun to dress-up
- • **Cozy All-in-One Comfort:** Soft fleece fabric keeps kids warm and snug on chilly nights
- • **Perfect Fit for Every Kid:** Six sizes from toddler to pre-teen ensure a tailored, comfy fit
- • **Versatile Party Essential:** Ideal for Halloween, themed parties, PJ days, and festive gifting

## Overview

The Sincere Party Blue Monster Onesie is a soft, mid-weight fleece jumpsuit designed for kids aged 3 and up. Featuring an embroidered monster face, detachable tail, and front zipper, it offers both playful style and practical comfort. Available in six sizes, this unisex costume is machine washable and perfect for Halloween, parties, or everyday cozy wear.

## Description

Shop Sincere Party Blue Monster Onesie Costume for Kids,Soft Cozy Warm Fleece Animal Onesie for Unisex Kids L(8-10). Free delivery and returns on eligible orders of £20 or more.

## Features

- Animal Onesie Costume-this is a fleece cute pattern blue purple spotted all in one suit with hood,zipper up front,easy for kids dress up.Machine washable cold,line dry!
- Simple Construction&Cute Design-this monster onesie for kids is an all in one jumpsuit features with a hood carrying with a lovely emb face,padded attached tail,cotton cuffs. The horns,embroidery eyes and face are just so cute,which making this little animal lover so vivid
- Soft Lightweight Material-our cute blue monster onesie is made of middle thickness fleece fabric,super soft and warm for a chilly weather Halloween night.The tail is detachable
- Wide Size Range for a Better Fitting-there are 6 sizes of our onesie costumes XS3-4，S4-6,M6-8,L8-10,XL10-12,2XL12-14.Suggest to check against the size chart to select,the recommendations for height and weight would give you an easier choice
- Perfect for Halloween trick or treat,animal costume onesie parties,pjm parties,daily wear,dress up parties ,themed birthday parties,Xmas gift and more occasions

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BR9CKHKM |
| ASIN  | B0FPMFCLM1 |
| Age Range Description | Kid |
| Apparel Fabric Stretch | Medium Stretch |
| Apparel Fabric Weight Class | Medium Weight |
| Best Sellers Rank | 21,223 in Toys & Games ( See Top 100 in Toys & Games ) 822 in Fancy Dress for Kids & Toddlers |
| Brand Name | Sincere Party |
| Closure Type | Zipper |
| Collection Name | Sulley |
| Colour | Fleece Monster Onesie Kids |
| Country Of Origin | China |
| Customer Reviews | 4.3 4.3 out of 5 stars (109) |
| Customer reviews | 4.3 4.3 out of 5 stars (109) |
| Date First Available  | 2 Sept. 2025 |
| Fabric Type | polyester |
| Fit Type | Loose |
| Fit to Size Sentiment | Positive |
| Garment Size Country | Great Britain |
| Holiday Type | Halloween |
| Included Components | Pants |
| Item Type Name | Pajama Set |
| Life Event | Halloween |
| Manufacturer | SP Funworld |
| Material | Made of cotton |
| Material Composition | 100% Polyester |
| Neck Style | Hooded Neck |
| Number of Items | 1 |
| Number of Packs | 1 |
| Occasion | Halloween |
| Part Number | PL001 |
| Pattern | Cartoon |
| Product Care Instructions | Machine Wash |
| Size | 8-10 |
| Sleeve Length Description | Short Sleeve |
| Special Features | Lightweight |
| Special Sizes | Plus Size |
| Style Name | cozy |
| Target Audience | Unisex-Kids |
| Theme | Holiday |
| Unit Count | 1.0 count |
| character | sulley |

## Images

![Sincere Party Blue Monster Onesie Costume for Kids,Soft Cozy Warm Animal Onesie for Unisex Kids - Image 1](https://m.media-amazon.com/images/I/61gVZHMxcmL.jpg)

## Available Options

This product comes in different **Color, Size** options.

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**Shop now:** [https://www.desertcart.jp/products/570326943-sincere-party-blue-monster-onesie-costume-for-kids-soft-cozy](https://www.desertcart.jp/products/570326943-sincere-party-blue-monster-onesie-costume-for-kids-soft-cozy)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-11-12*