itch.io

Here are the dimensions for each sprites:

Executioner - 87 x 59
Fire Golem - 64 x 57
Ghoul - 51 x 20
Ice Golem - 72 x 57
Imp - 50 x 50
Necromancer - 60 x 61
Phantom Knight - 57 x 51
Reaper - 48 x 46
Slug - 77 x 39
Undead warrior - 64 x 36