How heavy is too heavy to mail a letter?

Maximum weight for First-Class Mail letters is 3.5 oz; for large First-Class Mail envelopes and parcels, the maximum weight is 13 oz. All postcards and envelopes (or flats) must be rectangular, otherwise an additional charge may apply.

How heavy can regular letters be?

one-ounce
Forever Stamps are ideal for mailing normal-sized, one-ounce letters within the United States. If you suspect that your letter may weigh more than one ounce, be sure to weigh it prior to affixing a Forever Stamp, as heavier letters will be returned due to lack of postage.

What is the thickest a letter can be?

To be eligible for mailing at the price for letters, a piece must be: Rectangular. At least 3-1/2 inches high x 5 inches long x 0.007 inch thick. No more than 6-1/8 inches high x 11-1/2 inches long x 1/4 inch thick.

How thick is too thick for a letter?

To be eligible for mailing at the price for letters, a letter must be: Rectangular. At least 3½ inches high x 5 inches long x 0.007 inch thick. No more than 6⅛ inches high x 11½ inches long x ¼ inch thick.

Can I use two Forever Stamps?

You can use more than one Forever Stamp if you need to send a package or a letter that weighs more than an ounce. Each stamp is worth the current first-class rate (not what you paid for them). So if you paid $0.49 and the rate rises to $0.50, you can put two Forever Stamps on a package to get $1.00 worth of postage.

Can a jiffy bag be sent as a letter?

The large letter thickness must fit through that gap and not be any bigger than that grey area in the background (including the large letter area). The below section details about the letter, so, as long as it fits its all good – but it can’t be forced! Post offices have these too.

Can you put 2 stamps on a large letter UK?

You can put as many stamps as you like on a letter to make up the cost of postage. So if the cost of postage is 70p then you could put 1 x 1st class, or 2 x 35p stamps or, assuming the envelope is big enough, 70 x 1p stamps, although an envelope that big would count as a large letter and would therefore cost £1.06.

What happens if my letter is too heavy?

Customers must affix additional postage when mailing letters weighing in excess of 1 ounce and/or letters subject to the nonmachinable surcharge or mailpieces subject to another rate of postage (e.g., large envelopes or packages).