Card Stay

CardStay is a 3D-printed support insert designed for standard cardboard postcard storage boxes. It clips securely over both inner box walls and creates a solid support surface that keeps cards standing upright and aligned, even when the box is only half full. The product is made by the dealer behind Popeye's Postcards in Walkersville, Maryland — designed by a postcard dealer for postcard dealers and collectors.

CardStay replaces the makeshift spacers collectors and dealers have long used (foam blocks, wood chunks, pool noodles) and prevents the common problems of fallen stacks, mixed categories, and cards bending from slumping.

Features:

• Fits standard-size cardboard postcard storage boxes (approximate interior dimensions 6¾ × 4½ × 14 inches)

• Supports hundreds of postcards without bending

• Easy to adjust — slides to where it's needed in the box

• Useful for sorting at home, organizing collections, and setting up show booths

• 3D printed in durable PLA plastic

Other Sizes: Additional CardStay versions are available for 6" flip-front boxes and 6" open-top bin boxes through the maker's Etsy shop. A version for Sterilite and other square-bottom plastic shoe tubs is in development.

Care Note: Designed for normal indoor use. As with most plastics, prolonged exposure to high heat (hot cars, attics, direct sunlight) can cause warping over time.

Ordering: The cardstay.net URL redirects to the maker's Etsy shop, where the product is sold. Ships from Walkersville, MD. 5.0-star average rating across reviews.

Maker Background: Popeye's Postcards has been selling postcards on eBay since January 1998 and stocks approximately 1.4 million cards. The seller is also active on Whatnot, YouTube, and Facebook, and at live postcard shows.