40+ Haircut 4 On Top 1 On Sides. With the #4 size, you can start to get a brush or crew cut, which are similar to a buzz cut but include a skin fade on the sides and longer hair on top. About 3/4 of a inch on top.
Would look alright, as long as faided up.
The selection of low and high fades depends on the person. Below are 50 examples to get you. About 3/4 of a inch on top. Very popular in the 80's.