Post and rail fencing has evolved from the traditional 3x3 or 4x4 post with a 4" rail to now include heavy 6x6 posts with 6" rails. We continue to hold in stock a range of sizes and lengths to accommodate this and can offer bespoke sizes on request. All fully pressure treated on site. 1. Our posts come in a huge range of sizes from a 0.6m 45x36 marking peg up to a 2.4m 200x200 gate post. 2. The most popular rail is still the D-rail, traditionally nailed or screwed onto the face of square posts.