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  Envelopes Standard Sized Envelopes Envelopes must be rectangular to qualify for letter prices. 3  Large Envelopes Large envelopes must be rectangular to qualify for flat pricing. Large envelopes that exceed size requirements of a letter will be charged package prices. Packages Packages can be sent using Priority Mail ExpressÂ®, Priority MailÂ®, First-Class MailÂ® Parcels, USPS Retail Groundâ¢, and Package Services. Contents must not weigh more than 70 lbs. Lower weight limits may apply. Girth is the distance around the thickest part of the package. In most cases, the maximum combined length and girth is 108 inches.