I have a 16ft wall divided into 4 panels measuring 4x8ft. I want to write an 8 letter word on the 16ft. what size should each letter be?

Question

I have a 16ft wall divided into 4 panels measuring 4x8ft.

I want to write an 8 letter word on the 16ft.

what size should each letter be?

Answer 1

Two letters per 4 foot panel.

Now that would allow 2 feet per letter.

Yet in the real world some space must between the letters. 

Information is imcomplete.