A set of gargantuan spells hands:  “Clenched Fist”, “Interposing Hand” and “Grasping Hand” with trailing spell effects scaled for 28mm, but can be readily scaled to any size.

Available as 4 stl files (base which is usable for both Clenched fist and Grasping Hand), Interposing hand, Grasping hand and Clenched fist).

I use a scaling of 5mm = 1ft

The models are designed for 25-28mm scale gaming, but can of course be used in just about any scale.