Medium range IR distance sensor

Working on a project that requires a distance sensor with the range of the length of a human hand (≈2.54 - 25.4) Willing to make the sensor from scratch if needed.

Price range: $0 - 5 per unit

Size: needs to be smaller than a quarter.

Any suggestions?

--Inventor132--

A quick Google finds

https://acroname.com/articles/sharp-infrared-ranger-comparison

Weedpharma

https://www.pololu.com/category/79/optical-range-finders Especially this one: https://www.pololu.com/product/2464