4th and 5+/-inches then Def. Encroachment

[wisref2]

You tape the middle of the chain for a reason. If the downbox is past the tape - it will be a first down. If it's before the tape - the down remains the same.

If you have to - measure it as we did once this year. Just bring the chains out as you normally would do - and then look to see the if the ball is beyond the tape. If not, count the links (or otherwise determine how far the ball will be from the stake), move the stakes to the hash, and place the ball at the right distance from the stake.

Best way to make it look good is to make it look like you know what you're doing.