Glass Block - 7.5-inch x 7.5-inch x 3-inch - Craft Warehouse
CrystaLok 39.25 in. x 46.75 in. x 3.25 in. Wave Pattern Vinyl Framed Glass Block Window with White Colored Vinyl Nailing Fin CL4048SDCWH - The Home Depot
REDI2CRAFT 7.5 in. x 7.5 in. x 3.125 in. Wave Pattern Glass Block for Arts and Crafts (5-Pack) CB0808W - The Home Depot
Easy Glass Block Night Light - Make:
Creative Glass Block Crafts For Beginners - Chas' Crazy Creations
Decorated Glass Blocks with Vinyl & Lights - Jennifer Maker