TexasCHLforum.com

Some time back a mention was made that a quarter is almost 1" and could be used as a fast check of letter size. In other words, the letter should be a little bigger than a quarter.

There was also a post that argued if the wording of a 30.06 was printed on the back of your movie ticket you had been given effective notice. So I guess if you are given written notice in microprint on a ticket stub you can't carry but if the sign letters are less than an inch you can.