It’s only possible to print your photo as a wall mural if the image is at least one pixel per mm of wallpaper. So to cover a wall with size 360 x 240 cm, you will need an image with minimum resolution of 3600px x 2400px. The resolution determines how sharp your wallpaper will be on the wall. The proportions of the image should match the proportions of your wall – otherwise, some areas will be cut out – but don’t worry you can test how this looks after uploading your image. If you wish to use a higher quality image than the one you upload, simply upload the image in low quality, place your order and reply to your order confirmation with a WeTransfer or Dropbox link and we will happily use this high res image for your customized wallpaper design.