How to scale mesh to uv scale ?

I have a few faces with sprites from one texture(atlas). And i need to scale these faces to each own uv map.
But, how do this? Is there somewhere exist the magic button “scale mesh to uv map” ?

I’m not sure but I think you may want the ‘import image as plane’ add-on. ( packed )

Thanks, but i’m found another method. Use background image as reference of scale for sprites.