Fully intending on doing this all by hand, I started cutting out letters from one magazine, but quickly realized it was going to take A LOT of magazines to get enough variety... So I went the digital route, drawing and colorizing each letter 'clipping', randomly composing a 'whole lotta LOVEs', and then fitting them together.
Wallpaper Coverage Calculator
Based on the dimensions you provide, this calculator will determine the number of custom-length sections of paper you'll need to cover any surface. If the height of your surface varies, input the tallest dimension in order for the pattern to line up correctly.
Enter your dimensions in feet (1 foot is 30.48 cm).