These  are adorable cement animal planters - Tortoise, Hedgehog, Snail and Ladybug.   This listing is for the set of all four planters.  The air plants are not included.

The planters are about 4 inches long, and are made of cement. The openings are about 1.5 to 1.8 inches in diameter.

They could be used for air plants or for tiny succulents. They do not have drainage holes, and the interior opening is quite small (about 1.5" across).