Monument in the form of an arch with Photo glass embedded in columns of Pokostovsky granite. The distance between the columns is 500 mm, in this example of the monument the glass is rectangular - 500x700 mm, 12 mm thick (maybe 16 or 20 mm). Also, in such memorial complexes, double-sided Photo glass is often used - on the second side of the glass you can place another photo and they will not be visible. Or decorate with a collage of photos of a dear deceased person.

Portrait size 500x600 mm
The size of the monument is 1500x800