Yes, these are limited to 32x32 size, for grid based games/roguelikes or can also be used as icons or overworld sprites.
The other bigger sprites have a larger canvas for effects and movement.
Yes, this series will continue until the 10 elementals are completed. But at a much slower pace I'm afraid, since I'm prioritizing commissions at the moment to pay off some bills. Patreon have been removed so you don't have to pay anything while waiting... Check out this page once in a few months and I might release one or two this year. :D