Tile Length: Individual. Tile Width: 296mm. Verge tiles left/right are also available All tiles, fittings & accessories should be installed in accordance with the recommendations given in BS 5534: the British Standard Code of Practice for slating & tiling. Sitework should be carried out in accordance with BS 8000-6: the British Standard for workmanship on building sites. Contact Crest for technical support including estimates and fixing specification.