Unfortunately, bathroom ventilation fans often are set up so that they exhaust air to the space between ceiling joists, especially if the bath is located on a lower level toward the middle of the house.
The United States Postal Service defines a postcard as: rectangular, at least 3 1â2 inches (88.9 mm) high Ã 5 inches (127 mm) long Ã 0.007 inches (0.178 mm) thick and no more than 4 1â4 inches (108 mm) high Ã 6 inches (152.4 mm) long Ã 0.016 inches (0.406 mm) thick.
Size & Weight Requirements. 1  Postcards Postcards must be rectangular to qualify for First-Class MailÂ® prices. 2  Oversized postcard will be charged as a letter or large envelope. 3  Size Requirements: Height: 3 1/2 min. / 4  4 1/4 max. 5  Length: 5 1/2 min.