Amazon.com : Foam Core Backing Board 3/16" White 1 Side Self Adhesive 20x30-25 Pack. Many Sizes Available. Acid Free Buffered Craft Poster Board for Signs, Presentations, School, Office and Art Projects :
Wholesale Readi Board Water Resistant Foam Board 20x30 - GLW
20 x 30 Foam Core Mounted Poster
Custom Hard Back Photo Poster Board Printing | Walgreens Photo
Elmer's® 20 x 30 Foam Board White 25 Shts 3/16
In case anyone else is on the hunt, I just picked up my welcome/schedule sign from Walgreens for $18. It's a 20x30 poster board with a 50% off photo coupon. : r/Weddingsunder10k
Foam Core Backing Board 3/16" Black 1 Side Self Adhesive 20x30- 50 Pack. Many Sizes Available. Acid Free Buffered Craft Poster Board for Signs, Presentations, School, Office and Art Projects - Walmart.com
Amazon.com : 30 Pack White Foam Core Board 20 x 30 Inch Foam Core Backing Board Sheet 3/16 Inch Thickness Polystyrene Poster Board for Presentations, Signboards, Arts and Crafts, Framing, Display, Projects : Office Products
Foam Board-Perfect for projects or presentations-20 x 30 White board - Set of 25