Each card pack contains a number of pages as PNG images, each of which is a grid of 5x5 cards intended to be printed on A3 paper. You can download whichever pack best matches your needs. The pages in all packs are sorted by level, so that you can print new pages as your character levels up.
The spells in these packs encompass the D&D 5e SRD only. Spells from additional expansions such as XGTE are not included.