Hi, can you explain to me how I can find a design here if I know only its number?

I ask that for a design in Cute, not a design in designs by cuties

If you mean through designs by cuties, basically you have to just look through all the pages of the design. If you post here what the design is maybe someone will know or if you know who designed it you can ask them if they have a link. Otherwise, happy browsing, you might find more to download by going through the pages.