1. Letters that meet one or more of the nonmachinable characteristics in DMM 101.1.2 are subject to the $0.21 nonmachinable surcharge.
2. Large envelope-sized pieces that are rigid, nonrectangular, or not uniformly thick pay parcel prices.
3. For keys and identification devices, add $0.82. If more than 13 ounces, see Priority Mail (footnote #4) in Priority Mail—Retail.
5. The card price applies to each single or double postcard when originally mailed; reply half of double postcard must be designed for reply mail purposes only.