The reason why is because the US Post Office (USPS) has standard envelope sizes for postage – and I dislike paying more for first-class postage than I have to. *Ü*
Here are some envelope factors that will require you to pay more in postage ($0.21 as of this post):
- envelopes are that not rectangle in size (tip: always make sure you address your envelopes horizontally, not vertically, to be considered standard rectangle shape)
- envelopes that are more than 1/4″ thick (tip: be careful with your ribbon & embellishments when making your greeting cards)
- envelopes that don’t bend easily (tip: avoid more than 4 layers of cardstock (!) when creating your masterpiece)
- envelopes that have claps, strings or other non-standard closures.
The good news is that the USPS usually won’t charge you more than once if your card has more than 1 of the above exceptions. That said, you should always check with your local Post Office, just to be safe.
What is the standard envelope size?
Here is a handy dandy chart for the common greeting card/envelope sizes. The card sizes are based on an 8-1/2″ x 11″ piece of cardstock.
Tip: you will get 2 cards from every sheet of cardstock for the 4-Bar & A-2 sizes; 1 card for the A-6, A-7, and A-9 sizes.
- A-2 (standard greeting card)
Folded Card Size: 4-1/4″ x 5-1/2″
Envelope Size: 4-3/8″ x 5-3/4″
Cut Your Cardstock at 5-1/2″ x 8-1/2″, scored at 4-1/4″ *
*you can also cut at 4-1/4″ x 11″ and score at 5-1/2″
Folded Card Size: 4-1/2″ x 6-1/4″
Envelope Size: 4-3/4″ x 6-1/2″
Cut Your Cardstock at 6-1/4″ x 9″ and score at 4-1/2″
- A-7 (common size for Wedding Invitations)
Folded Card Size: 5″ x 7″
Envelope Size: 5-1/4″ x 7-1/4″
Cut Your Cardstock at 7-1/2″ x 10-1/2″ and score at 5-1/4″
Folded Card Size: 5-1/2″ x 8.50″
Envelope Size: 5-3/4″ x 8-3/4″
No need to cut cardstock, score at 5-1/2″
Square is defined by length = width
5″ x 5″ is the minimum size envelope that can be mailed
Square envelopes are considered odd-sized and are non-machineable
$0.21 extra postage required
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