Highgate Solid Smoked Oak Brushed & Matt Lacquered 123mm x 15mm Wood Flooring A fantastic Smoked Oak solid wood flooring. Each individual board is 123mm (12.3cm), the overall thickness of the plank is 15mm (1.5cm). The installation system on this product is tongue and groove, which would usually be fitted by gluing the planks together and using the glue down method to fix the boards to the sub-floor. The grade of this Oak is mixed, meaning it will contain some knots as is typical with Oak products. #solidwood #woodflooring #flooringexperts #oakflooring #flooring