Based on this product's specifications, here are some alternatives and similar models
Photo frame ArtFlow 9117217 for 13x18 cm photos, polystyrene construction
Summary description:
A photo frame designed for 13×18 cm prints, model 9117217 by ArtFlow. Made of lightweight polystyrene, it protects and displays photos on walls or tabletops. Features a clear front, rear support for standing placement and mounting hardware for wall hanging. Suitable for home, office or gift use; offers easy insertion and secure fit for standard 13×18 cm images.