Blender texture resolution issues

Hi,

I am currently tying to import blender models to unity but I am having some issues with the textures.

I should also warn, I am almost a total novice in the realm of 3d graphics.

Ok, my problem:

I have created a mesh in blender, with a simple material. I UV unwrapped it, and textured it. Every thing in blender looks great, but when I import this into uity, though the texture shows on the model, its resolution has changed, so instead of a nice high res texture, I'm ending up with a pixelated mess...

If you need any more information feel free to ask and thanks for any help in advance!