Local feature size

Hi there! "Local feature size" is a fancy way of saying how big or small something is in a very specific spot. Imagine you are drawing with crayons on a piece of paper. You use a blue crayon to make a big, wide circle, and then switch to a red crayon to make a smaller circle inside the blue one. The size of the blue circle is the "feature size" of the whole drawing, but the size of the red one is the "local feature size" - just the size of that small spot where you drew the red circle.

In real life, things have different sizes in different spots too! Maybe you use a microscope to look at a tiny bug. If you zoomed in really close on one tiny spot, you might find that the bug's leg has tiny bumps on it. Those bumps would be the "local feature size" because they are just the size of that small spot on the bug's leg.

So "local feature size" is just how big or small something is in one little area, kind of like a small detail in a bigger picture.