Crystal Art Card Kits are sold in packs of 5* per SKU (image).
Four SKUs would fill one carton (20 cards total), but cartons are not required; only the individual SKUs (card packs) have minimums.

Suitable for ages 8+. Approximately 60 to 90 minutes assembly time. Card size is 7" x 7" with blank message inside. Partial crystal.

Each Crystal Art Card Kit includes:

Coded adhesive design template
Double-sided crystal pick-up pen
Jelly wax
Coded pre-sorted crystal packets
Grooved crystal tray
Ziplock bags, Instructions
Envelope