Nails are one of those little details that will make your avatar handsome.
However, if badly adjusted, it won't have the same effect.
Adjusting nails to your shape is actually something very simple. You just need to chose a hands size between 10, 20 or 30, mod if on your shape under torso/hands and wear the appropriate nails version.
But what about adjusting it to your skin ?
On any skin, there are drawn nails. Depending on the skin maker, those nails will be drawn differently. It means that with some skins, the drawn nails could appear under your prim nails. And that is totally ugly.
That's why we brang a nails base. It will not always be needed but when it is, wear it. It is a gloves layer.
It is of course tintable so it fits to any skin.
To tint it, wear it and go on appearance then under gloves and open the color picker. Chose the color that is the closest to your skin tone.
The original nails base has been created using League - Sia - Fair as a skin.
Suggestion : since the nails base is copy, make different copies and modify the name of it for each of your favorite skins.
Example : Nails base - League - Fair or Curio - Acorn or Plastik - Poem.
This way, when you'll change skin, you'll just have to wear the appropriate nails base without having to mod it again.