Framerate and file size

Any sprite-based game requires careful balancing between quality and performance.
Let's think about framerate. It's very low in Ragnarok Online, max 8 frames per one movement of character in one direction. What if I'll greatly increase the frames? I want to calculate what will be size of new file.
I have a Ranger's .act and .spr files. It has very small size of 204 kB, because pixel art, low framerate. And contains only 116 sprites for all character's movements.

Idle - 5 sprites
Walking - 40 sprites
Sitting - 5 sprites
Picking Item - 4 sprites
Standby - 12 sprites
Attacking 1 - 8 sprites
Receiving damage - 2 sprites
Dead - 2 sprites
Attacking (knife) - 12 sprites
Attacking (bow) - 16 sprites
Casting spell - 10 sprites

So the size of one sprite is approximately equal 1.75 kB (compressed). My ToS sprites are x3 bigger.
I'll Increase next animation positions like this:

Idle - 5 sprites
Walking - 150 sprites
Sitting - 5 sprites
Picking Item - 20 sprites
Standby - 60 sprites
Attacking 1 - 20 sprites
Receiving damage - 20 sprites
Dead - 2 sprites
Attacking (knife) - 60 sprites
Attacking (bow) - 60 sprites
Casting spell - 40 sprites
Total - 442 sprites

773 kB (normal size) * 3 (ToS size) = approx 2.3 MB of .spr file size.