It all depends on what you want to achieve with your photos. If you are simply only doing head shots then a 5x6-6x8 would be enough. However for the maximum use of a backdrop, we would recommend a full length. A full length backdrop would be 8x16 or larger. Ordering full length backdrops allows you to move the subject around and photograph different angles which will allow for multiple posing and is also big enough for multiple people to be photographed at one time. The most popular size we offer is either an 8x10 or 10x10 for those who do not have room for a full length photo backdrop.