Here is a reference for how different sized prints look hung up on the wall. The couch in this photo is 7 foot long. Usually bigger is better, unless you’re doing some type of collage. One tip I’ve said to clients before is to figure out a space on the wall that you’d like to feature a photo of your pet before the session. Then use newspaper and tape it on the wall in the various sizes to really see how big a print would be in your space. Then, if you’ve decided a 16×24 would be perfect, I can make sure that I keep that in mind during our session.