Tire size question?

How much taller would the sidewall of a 215/70/15 tire be compared to a 205/70/15?

http://www.miata.net/garage/tirecalc.html

P215 = Width in MM
/70= % of Width which will equal your sidewall
R15= Rim diameter

So to your question: Width difference= 15mm*.7= 10.5MM = about .41 inch

Ahh, good deal on that link, and the formula!

Thanks!