Prices for most U. S. Postal Service mailing will change on January 22, 2012. The increase will affect letters and postcards. Increases are as follows:

Cards: Between 3½” x 5” x 0.007” and 4¼” x 6” x 0.016”
Postage: 32¢ - Requires card stock quality paper

Letters: No greater than 6⅛” x 11½” x ¼” & 3.5 oz. (#10 envelope)
Postage: 1 oz. = 45¢ (Add 20¢ for each additional ounce)

Flats: Between 6⅛” x 11½” x ¼” and 12” x 15” x ¾” (i.e. our 9 x 12 manila envelopes)
Postage: 1 oz. = 90¢ Add 20¢ for each additional ounce

Parcels: No greater than 108” in length and girth
Postage: Up to 3 oz. = $1.95 Add 17¢ for each additional ounce

Three-cent stamps will be available through ANSC for use on postcards that have the 29- cent stamps currently on them.

Source [Anne R. Lockwood, N-EA]