Please see video above for installation advice. Released in June 2020, the genuine Posh Rulers Height Indicator Tape version 2.0 is made of a new material and sticking method that helps to maintain the accuracy of height measurements ranging from 0 to 84” with 1/8” graduations and from 0 to 213 centimeter graduations. Made for indoor use, it suits applications in the home, school, gym, hospital, clinic or vet surgery when you need to make a quick height measurement of people or animals. Unlike vinyl height indicator tapes, the genuine Posh Rulers Height Indicator Tape v2.0 uses a special substrate that under normal usage can't be stretched, which can be an issue when applying a continuous plastic sticker-style tapes, particularly poorer quality knock-offs not made in the USA. As shown in the video, at a convenient 1 1/2” wide, Posh Rulers Height Indicator Tapes have been designed to suit common standard door frame casings (i.e. the frame that surrounds your door) for internal and entrance/exit doors. It just needs a clean, smooth surface for the bottom and top adhesive tabs to stick on (bumpy, porous and oily surfaces can prevent effective sticking). Of course, it can be stuck to a wall, glass or other clean and relatively smooth surfaces. Whatever you stick it on, as long as it has at least 3” at the base to stick to and your wall is at least 82” high, then the tape will work perfectly.