Mermaid Onesie Pajamas for Party Costume and Sleepwear

  • Made of high-quality fleece, it is so cozy and warm when you is sleeping. He/she can wear it to the party, and he/she will become the focus of people. 
  • Material: flannel
  • Cozy Mermaid unisex onesies for Christmas, Party, Halloween, Sleepwear, Home wear, Cosplay, Birthday and so on.
  • SIZE: 
    Size Chest Waist Sleeves Length
    S 87cm 81cm 63.5cm 150cm
    M 91cm 87cm 64cm 153cm
    L 97cm 91cm 64.8cm 155cm
    XL 101cm 97cm 65.5cm  158cm



            Orders need 3-5 days for processing and then it is shipped. All orders are delivered within 5 to 15 business days depending on your geographical location. Due to the high demand on some of our most popular products, please allow up to 2-4 weeks for delivery. If your order hasn’t arrived in the estimated delivery times, please contact our support team at