Size it to where it stands and how far away people read it, not to the largest option on the page. A reception or doorway sign read from a couple of metres can be modest; a piece meant to pull people across a busy exhibition hall needs real presence to compete with everything else that’s lit.
The quick method: measure your floor space, picture the furthest point someone reads it from, and size up from there. A Bespoke LED Standing Light Box lost in a big foyer, or wedged into a tight doorway, does only half its job however good the artwork is, so fit matters as much as design. Keep the logo bold and uncluttered so it holds up at distance.
Tell us the setting and viewing distance when you request your mock-up and we’ll point you to the right size. Start with a free mock-up so you see it at true scale before ordering.