FAQs About Glass Block Sizes

Glass blocks are used in a variety of settings and construction choices. They come in multiple sizes and thicknesses, each designed for a different use or a different look.

Q: What are the dimensions for glass blocks?

A: Solid glass blocks do not have a hollow center like those commonly used for crafts. They come in a 7 5/8 inch square with a 3 inch thickness. Hollow glass blocks come in 2 inch, 3 inch and 4 inch thicknesses, depending on their purpose, and come in a large variety of face sizes. The greatest variety of face sizes are available for blocks with a 3 inch thickness.

Q: What glass blocks are most appropriate for windows?

A: Glass blocks used in windows are no more than 3 inches thick. By and large, 2 inch thick blocks are used in large windows because they are lighter, whereas 3 inch thick blocks are used to create walls, like shower walls, and other larger structures. Four inch blocks are used in craft projects like creating night lights. Many are available with pre-drilled holes for installation or decoration.

Q: Are all face deminsions square?

A: No. Though most face dimension are square, a wide selection of shapes including rectangles, books, hexagons and more are available through dealers that handle specialized project blocks. The face size on these blocks vary by design and manufacturer.

Q: Are large blocks which cover several feet available?

A: Yes. Pre-manufatured block walls are available in up to 6 foot by 8 foot pieces. These larger sheets can speed the process of creating a large structure, like a shower, because there are fewer joints to mortar.