Our finished stereo cards are 3.5" x 7" and fit in a classic "Holmes" style stereo viewer or modern stereo viewers such as the Brian May Owl viewer available here.
Our cards are mounted on a 4 ply matte board that give the same look and feel as the classic cards.
Supernova Blast Bonanza in Nearby Galaxy
Perseus
Towering Infernos - PIA03096
All Pillars Point to Eta - PIA03515
The Infrared Helix - PIA03294
Cassiopeia A: Death Becomes Her - PIA03519
Celestial Fireworks - PIA04609
In the Blackest Night, a Green Ring Nebula - PIA14104