These are simple, fast and easy to print spell trackers for 5th edition dungeons and dragons and are sized for 16mm six sided dice.

Full - Meant for characters that can cast up to level 9 spells at level 20.

Half - Meant for characters that can cast up to level 5 spells at level 20.

Third - Meant for Characters that can cast up to level 4 spells at level 20

If you live in the US and you're interested in buying one you can find them listed here along with other variants of it.: https://avocadoprintsshop.etsy.com/listing/1630663127