UNUSED, but laid out and tried to use. 5.8 m long x 50cm wide (49cm) = 2.84 SQM. THE BACKING HAS BEEN CUT IN TWO PLACES BUT THIS HAS NO DETRIMENTAL EFFECT TO THE INTEGRETY OF THE MAT. YOU WOULD NOT LAY THIS IN A STRAIGHT LINE BUT SHAPE IT AROUND WHERE YOUR FURNITURE WILL GO , so the backing is always cut with the silver backing it is designed for use with wooden flooring on top of you remove the foil this subject to verification by an electrician could be used under tile. A THERMOSTAT MUST BE USED and if for a bathroom installed outside. CHECK LOCAL REGULATIONS.