INFO CENTER
718-965-2500
FAX 718-965-2504
A Flat-size piece must meet specific USPS parameters :

More than 11-1/2 inches long, or more than 6-1/8 inches high, or more than 1/4 inch thick

Must be at least 3-1/2 inches high and at least 5 inches long and be at least 0.007 inch thick.

Must not be not more than 15 inches long or more than 12 inches high or more than 3/4 inch thick.

Must be rectangular with four square corners or with finished corners that do not exceed a radius of 0.125 inch (1/8 inch)

Minimum Flexibility for Flat-Size Pieces

Flat-size pieces must be flexible.

Test flats as follows:

1. Place the piece with the length parallel to the edge of a flat surface and extend the piece halfway off the surface.

2. Press down on the piece at a point 1 inch from the outer edge, in the center of the piece's length, exerting steady pressure.

3. The piece is not flexible if it cannot bend at least 1 inch vertically without being damaged.

4. The piece is flexible if it can bend at least 1 inch vertically without being damaged and it does not contain a rigid insert. No further testing is necessary.

Maximum Deflection for Flat-Size Mailpieces

Flat-size mailpieces must meet maximum deflection standards. (Flat-size pieces mailed at high density, high density plus, or saturation prices, and flats mailed at basic carrier route prices entered by the mailer at destination delivery units (DDUs), are not required to meet these deflection standards.) Test deflection as follows:

1. Place the piece on a flat, straight-edge surface with the length perpendicular to the edge of the surface and extend the piece 5 inches off the edge of the surface. Test square-shaped bound flats by placing the bound edge parallel to the edge.

2. Place a flat 12-inch ruler (or other similar flat object 12 inches or longer) on top of the mailpiece with the length of the ruler parallel to the edge of the surface and as close to the edge as possible so that the 5-pound weight does not extend past the edge.

3. Place a certified 5-pound weight on the center of the ruler to hold the piece in place.

4. Determine the vertical deflection in inches.

5. Turn the piece around 180 degrees and repeat the process.

6. The piece is mailable as a flat if it does not droop more than 3 inches vertically at either end.

Address Placement

Address Placement on Card, Enveloped or Polywrapped Pieces

a. The "top" of the mailpiece is either of the shorter edges.

b. The entire delivery address must be within the top half of the mailpiece

c. If a vertical address will not fit entirely within the top half, the address may cross the midpoint if it is placed within 1 inch of the top edge.
 
d. If the delivery address is placed on an insert polywrapped with the host piece:

1. The address must not appear on a component that rotates within the bag.

2. The address must remain visible throughout the addressed component's range of motion.

3. The insert must be affixed to maintain the address entirely in the top half throughout processing and delivery or, if not affixed, the insert must maintain at least the beginning 0.5 inch of the address in the top half. The "beginning 0.5 inch" means the first half-inch of the recipient, delivery address, and city/state/ZIP Code lines, and not the end of each line.


Address Placement on Bound or Folded Pieces

a. The "top" is the upper edge of the mailpiece when the bound or final folded edge is vertical and on the right side of the piece. Exception: For Carrier Route (or Enhanced Carrier Route) saturation pieces, the "top" of the mailpiece is either of the shorter edges.

b. The entire delivery address must be within the top half of the mailpiece 

c. If a vertical address will not fit entirely within the top half, the address may cross the midpoint if it is placed within 1 inch of the top edge.


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INTERSTATE EDP & DIRECT MAIL CENTER, INC - 754 FOURTH AVENUE - BROOKLYN, NY 11232 - 718-965-2500
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