this question might sound weird but how do u make sprites to look 16 bit ish

click "16"

Make them larger, I think they need be 16x16

16-bit sprites used 16-bit color palettes. It doesn't necessarily have to be a certain size. Technically, a 16-bit sprite could have up to 256 colors at once. I'm not really sure how to make a sprite look more "16-bitish", though I certainly know what you're talking about. The first thing that comes to my mind is just adding more detail and shading, but I'm really not an artist so I'm not sure.