HELP WITH SPRITE RIPPING!

[Seven Seas]

I'm using MAME Plus J.E.T Advance Edition v0.134 to rip sprites. I can get the sprites I want but the only problem is that the sprites are all stretched and I can't seem to find a way to make it look normal. is there a way to un-stretch these sprite in the emulator I use?

[Kendotlibero]

use the 1:1 ratio on mame