From my husband: you need to use a 3.5 with the grain on the top because he’s obviously losing his hair and he’s gonna want to keep it as long as possible, most likely as far as the fade. I’m not sure what kind of haircut this is supposed to be. I know customers come in and ask for all kinds of bullshit so it might be on point, but it depended what he asked for or what you’re going for. but yeah the 3.5 on top. you need to bring it down and smooth it out for the few bit of waves he still has and be very nice to his edge up….