Single-sided 2D sturdy and durable acrylic. 

Specification:
Product: DIY Diamond Painting Pendant
Material: High-quality PET + Fancy-shaped Rhinestones + Crystal Rhinestones
Size: 20cmX17.03cm/7.87X6.7in

Package Content
1 x Rhinestone Pendants (Rhinestones need to be glued on)
1 x Chain
1 Set x Rhinestone Bag: