These protectors have been designed to fit with single pack booster (Pokemon, Magic, Yu-Gi-Oh) and hockey cards, created from 0.35MM thick PET to ensure your Pokemon Single Pack Booster card is protected and dust-free. Showcase and protect your most prized Pokemon Booster Collection in these crystal clear envelopes. All while keeping them in pristine condition, preventing the display case from being damaged and free from dust, grime, fingerprints, and scratches. These envelopes are shipped flat and are easy to unfold and assemble into the proper shape. They are also individually wrapped with protective film to ensure that each case arrives scratch-free.