Amazon.com: 12 x 12” Clear Acrylic Sheet Plexiglass (4-Pack) – 1/8” Thick; Use for Craft Projects, Signs, DIY Projects and More; Cut with Cricut, Laser, Saw or Hand Tools – No Knives :
Clear Acrylic Plexiglass 1/2" x 18" x 48” Plastic Sheet | eBay
Acrylic White Sunboard Sheet, Thickness: 1-2 mm, Size: 4x8 Feet