Arcknight's Flat Plastic Miniatures are affordable, high quality plastic transparent standees with unique double-sided art and perfect registration.
The Flat Plastic Miniature (FPM) is similar to a cardboard pawn or papercraft mini, except that it's  produced on thick transparent plastic. They are artistically pleasing without any white edges and can be used to create a library of miniatures OR supplement the existing miniatures you already have. Now thousands of gorgeous miniatures can be sorted and carried in no more than the size of a shoe box or bead tray. Highly durable; flexible, wet and dry erasable, impervious to spills and gone are the days of breaking off your favorite miniature’s arm. Designed to heroic 28mm scale, pieces are scaled appropriately to stand alongside traditional miniatures and are exceptional for filling out rare or missing pieces from your collection, as a one-shot solution for an entire set, or for children who may damage traditional miniatures.

The range of these 580 miniatures ranges from PCs & NPCs, Beasts, Oozes, Fiends, Aberrations, Monstrosities, Undead, Elementals, Giants, Dragons, and more! *Use images as references* Each Flat Plastic Miniature is unique and is not a duplicate!

The ones that I remember from their shop website include: Ancient Evils, The Grove, Wildlands, Mankind, The Underground, Ancient Evils Horde, Wildlands Horde, The Grove Horde, Mankind Horde, The Underground Horde, and Dragonborn (which makes up 527 of them).

Included:
580 2D Arcknight Flat Plastic Miniatures
95 Small Round Bases

Bonus: 
Buffs and Debuffs Indicators *Use image as reference*