The best way to accurately record your measurements is to do so on a piece of paper. Draw out a plan of the whole wall (to scale if you can) that the splashback is going to cover. Accurately record any items that are on the wall such as cupboards, cooker hoods, sockets or switches in their exact locations.
Any cuts or holes that need to be made for these items will have to be accurately marked on your plan when you submit the template. Once the glass is toughened it will then be almost impossible to make any adjustments. For further guidance please do not hesitate to get in touch.
Where socket cut-outs are less than 20mm away from the edge of the glass, a slit will be put (for toughening purposes). Also, for all square cut-outs, please allow for a 10mm radius in each corner.