That's interesting ... he's still quite clear even though he is now smaller. I think he might still be too large for a human sized figure - but would be worth you having a look at some of the existing images to get the correct scale (and location on the tile - i.e. his feet need to be in the 'middle' of the floor tile).
For example, see this image that I created when I was in the development stage for the new human male images - to get the correct foot location / height of figure:

Don't forget, you can easily test out in-game any images you have by putting them into your client/gfx_user folder and naming them appropriately. For example, if you name your images human_male.111.png, etc. they will replace (for your client only) the standard human_male images.
Refresher on image naming conventions until the Wiki is back up and running:
file.xyz.png
x = action, = 0 for sitting/resting, 1 for idle, 2 for running, 3 for attacking
y = direction, 1-8
z = animation frame (1-4 for human_male, 1-3 for all other player races)