Texture stretching on the terrain

I've been havin this problem for a while, and im not suer how to lessen the problem of it. The problem is, my textures get stretched wayy too big for my terrain. I made the square size much smaller and that fixed it, but made my terrain very small. Does anyone know a way i can keep larger square sizes for a bigger terrain, but so that my textures aren't stretched out so bad? Thanks.