Sizing
Guides in LED Neon Sign Guides covering sizing.

How to Measure Your Wall Before Ordering a Neon Sign
Measure the usable width, not the whole wall, then take about two thirds of it for the sign and mark that out in pain...

What Size Neon Sign Do I Need?
Size to viewing distance, not to wall size: pick the letter height first and let your word count decide the width. In...