<< <i><< Actually, it's 1/4 inch. Russ, NCNE >> 3/4 of an inch. Check out the back of a Delivery confirmation slip. >> I just checked on and I stand corrected. Don't know why I thought it was 1/4". Russ, NCNE
<< <i>If the package is under 3/4 of an inch in thickness, you have to pay Priority Mail shipping to use delivery confirmation. >> Actually, it's 1/4 inch. Russ, NCNE