The chap I sit behind when I watch my local team is taller than average and is a “sniper’s dream”. Today, during a quiet spell in the game – a head injury, ironically – I calculated that the area of that is eclipsed for me by his large bonce is about 1.4% of the pitch. On reflection, that’s not too bad. Workings shown below.
M 62. UK size 9.5
The pitch is 18 x 12 lawn squares in area. His head hides about 3 full squares which is 1.38%