How to scale a texture material in a mesh part

Hi everyone, I have a single mesh with 3 different UV Map, to apply to each one a differen texture material. I earned this but now I want to scale the material to fit well in the mesh’s part, how can I do this?

You can see that are number materials, i want to make it littlest without “replicate” the material.
The original mesh is this one:

TextureCoordinate material nodes should do the trick. Just set the U and V values to scale the material.