Outdoor Signs – Visibility of Letters, Amount of Copy, & Readability
Signage 101 - Letter Height Visibility, Signs.com Blog
6 Parking Lot Signage Standards & Tips for Businesses
End-of-Rack Signs Flue Space Signs for Back-to-Back Racks
FAQ — Sign Pro of Ames
Letter Sizing Calculator
About Us
design Archives - Signs World Wide Blog
letter height versus speed - Google Search
Arts & Science of Sign Design - Signage Foundation, Inc.
What size sign do I need
Mastering Sign Visibility AlphaGraphics Atlanta Buckhead