Pave it Safe Pavers come in the form of large sheets/slab style for easy laying. Pavers are 900mm x 900mm in size & come in 2 thicknesses: 25mm: Suit laying on existing hard surfaces “Easy to lay, over existing flat surfaces eg: pavers, concrete, timber decks, crushed rock, etc...” 45mm: Suits laying on any dirt/grassed surfaces “These pavers are simply laid like normal pavers over crushed rock”