A wedding arch should be a curved structure which is composed by the vinyl, metal and wood and it is common in the outdoor weddings. The couple takes pictures under the arch in the place of the altar. Decoration is a priority for the arch and you can know how to decorate a wedding arch with tulle which gives the arch a beautiful look in a simple way. You have to measure the arch so that you can know how much tulle you need. You can find the tulle from fabric or craft store. The color of the tulle should be in one color of your color wedding theme or you may just stick to a white fabric.