Hi Imran,
Set in the Texture Tag the Length U and the Length V to a different % value. That will change the size of the UV mesh.
Here is a little one minute sketch:
https://www.amazon.com/clouddrive/share/rHn9oIBkYYokLGhdBc82vW8U9YssD9Fki3wf9hluxdk
The Texture is normalized. As mentioned, it will be in the size of 0-1 for each axis. Otherwise, you could not exchange a texture with a different resolution without losing the position on the surface. This space is always 0-1 for U and 0-1 for V. Normalized.
If you like to have the UV mesh scaled, use the Length U and V parameter in the Object Manager> Texture Tag>> Attribute Manager> Texture Tag> Length U and Length V.
You could send me a Dropbox link to my Private Message box, so I can see what you have. Save it with assets!
Cheers