This is how most conversations start around here. Sometimes it’s ‘walls’. So what I usually suggest is that they send me a photo of said wall preferably ‘straight ahead’ as opposed to angled although hallways can be difficult. It’s also good to have something I can scale to such as floor to ceiling or the measurement of the sofa or tv. The best is to measure off a foot of blue tape. That way the sizes in the ‘digital comps’ will be accurate.