Our monster size ranges from 64x64 to 128x128. In general, they are going to be slightly smaller than RPG Maker RTP monsters, though not by much.
For reference, this would be the size for a regular orc.
Sorry, I meant the characters, or whatever you call them on the maps.
No worries, so the base resolution for our sprites are 16x20. In the packs, we've included an enlarged version of 32x40 and 48x60 that is compatible with RPG Maker VX and MV/MZ respectively.