Kota Blue Limestone Paving Patio Packs Slabs have a very uniform appearance, it's relatively smooth but not slippery and flat and has an "orange peel" type of look to its surface. The texture is very tactile and "grippy". It comes in 4 sizes 900 x 600 600 x 600 290 x 290 290 x 600 Don't forget too that the Kota blue limestone paving slabs are produced with a consistent depth of 22mm calibrated which makes them easy to lay quickly - saving both time and cost.