The Marmoleum tile collection includes Marmoleum Modular tiles with a 2.5mm thickness in sizes of either ~10"x10", 10"x20", or 20"x20". Marmoleum Composition Tile (MCT) is a much greener alternative to Vinyl Composition Tile or VCT. The MCT is approximately 13"x13" and with a 2.0mm thickness.
Forbo has discontinued the Dual Tiles in the 13"x13". Marmoleum Modular now offers more colors and sizes. While stock remains, DwellSmart is discounting the Dual 13"x13" and the 20"x20" colors that did not carry over to the new Modular line.
Forbo has a great tool which enables you to Combine Marmoleum Colors
. You can use this tool to see colors adjacent to each other.
Download: Marmoleum Sheet and Tile Installation Manual
Download: Marmoleum Care and Maintenance Guide