The problem
Awkward openings and badly mounted mirrors never look right.
A standard product almost never matches an arched, oversized, or non-rectangular opening. The gaps get filled with excessive sealant, frames sit slightly crooked, and the whole installation looks like a compromise. Mirrors that are not measured, cut, and mounted properly are both a safety concern and an eyesore: wonky edges, visible adhesive overflow, and glass that does not sit flush against the wall.