Based on this product's specifications, here are some alternatives and similar models
Protective Art Smock Astra for children 3–5 years, universal size
Summary description:
Children's protective art smock by Astra designed for ages 3–5 years in a universal size. Intended to protect clothing during painting, crafts and messy play, it provides full-front coverage and easy on/off use. Suitable for kindergarten, preschool art classes and home creative activities where spill and stain protection is needed.