Seves Clarity 4 in. Thick Series 12 in. x 12 in. x 4 in. (3-Pack) Clear Pattern Glass Block (Actual 11.75 x 11.75 x 3.88 in.) WCL12X12 - The Home Depot
Amazon.com: ZAQYCM 6 Pack Glass Blocks for Wall, Home Partition Screen for Window/Showers/Bathroom/Hallway/Office, 8x8x3inch : Tools & Home Improvement
Seves 3 in. Thick Series 8 in. x 8 in. x 3 in. (10-Pack) Wave Pattern Glass Block (Actual 7.75 x 7.75 x 3.12 in.) WA883 - The Home Depot