To determine the value of the donor area, you need to measure the donor density in the donor area as well as the value of each hair in terms of donor hair thickness. These two numbers will allow you to know how good your donor supply is and how many grafts you can move safely, now and in the future. I routinely measure these numbers; see here: https://baldingblog.com/creating-a-personalized-master-plan-for-present-and-future-balding-photos/. I also have be suggesting that you purchase a micrometer from Amazon (only $22) to measure the thickness of single hair shafts in the back of your head. The product I use can be found here: https://www.amazon.com/dp/B09964YBMF?psc=1&ref=ppx_yo2ov_dt_b_product_details
