Wedding Invitation & Envelope Size Options

Wedding invitation sizes can vary a great deal; but a standard size for one is a 5" by 7". An invitation that is smaller may indicate a less formal engagement, and a bigger one may need extra postage. A 5" x 7" invitation is an ideal size, but regardless there is a list of other available wedding invitation sizes below:

Flat invitations

  • 3.5" x 5" (RSVP card)
  • 4" x 6"
  • 4.25" x 5.5"
  • 4.25" x 6"
  • 4.5" x 6.25"
  • 5" x 7"
  • 5.5" x 5.5"
  • 5.5" x 8.5"

Folded invitations

  • 7" x 5" (folds to 3.5" x 5")
  • 8" x 6" (folds to 4" x 6")
  • 8.5" x 5.5" (folds to 4.25" x 5.5")
  • 8.5" x 6" (folds to 4.25" x 6")
  • 9" x 6.25" (folds to 4.5" x 6.25")
  • 10" x 7" (folds to 5" x 7")
  • 11" x 5.5" (folds to 5.5" x 5.5")
  • 11" x 8.5" (folds to 5.5" x 8.5")

Envelope Size

Consider envelopes to be 1/4" bigger than both sides of the invitation. For example, if your invitation is 5" x 7", your envelope should be 5.25" x 7.25".

Paper & Cardstock Weight

The weight of cardstock is referred to the weight of 500 sheets of 20 by 26 inches (the size of the standard sheet changes based on the type of paper being referred to). The weight of paper can be referred to in lbs. (pounds) or gsm (grams per square meter). Needless to mention, lbs. are more often used in the United States, and gsm is more of a European standard (metrics). A simple conversion is 1 lb. = 2.708 gsm for cover paper. For wedding invitations, cover or cardstock paper weight is what we'll be looking at. The range can be between 45 to more than 200 lbs. The bigger the number, the heavier the sheet and more elegant the feel. Here is a guideline for cover or cardstock paper weight:


Opacity refers to the ability of light to pass through paper. The higher the opacity, the less likely for printed words on one side to show on the opposite side. Opacity is rated from 1 to 100, of which, most papers fall in the 80 to high 90 range.


Brightness is referred to the way light is reflected off the paper which affects the readability of the paper. The brightness has a range of 1 to a 100, the higher the number, the brighter the paper. Lower brightness level means the paper will look dull and too high of a number will have too much glare and may make it difficult to read. Just to give you an idea, a regular printer paper would have a brightness of around 80; but photo paper would have a brightness level or mid 90's and higher. Paper that is coated will have more brightness than an uncoated paper.

Thickness (Caliper)

Caliper is referred to the thickness of one sheet of paper. It is specified by 2 ways: points or inches. A simple conversion formula would be 1 point = 0.001 inches. The bigger the number, the thicker the paper.