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When it comes to choosing card and paper supplies for your scrapbooking and card making projects, it can be difficult knowing where to start. With so many different sizes of card and paper available, we thought we’d try and help by giving you a quick reference guide.

Card Blank Sizes

When it comes to card blanks, the size given refers to its folded size – ie the front face of the card. So for example, an A5 card blank is a card with an A5 front, even though the sheet of card used to make it is A4.

Square card blanks have simple measurements in cm or inches, and tall DL card blanks are in a category all their own – they are the same size as a sheet of A4 folded to a third of its size, like a business letter. The measurements of a DL card blank are 21 x 9.9 cm (8.3 x 3.7 in).

Envelope Sizes

Generally speaking, envelope sizes are given as C plus a number, and this number corresponds to the paper or card blank size that fits inside the envelope. For example, C4 envelopes will fit an A4 card blank or unfolded sheet of A4 inside. The measurements are slightly bigger for the envelope – ie a C4 envelope will be a bit larger than A4, to allow plenty of room.

There are also square envelopes to fit square card blanks, and DL envelopes to fit tall DL card blanks. Again these will be slightly larger than the card blanks they are designed to hold.

The Best Card Blank and Envelope

A Simple Guide to Paper and Card Sizes Reviews
ImageBrandFeaturesRatingPrice

Craft UK 281 C6 Card and Envelope pack of 50 - Mixed Bright

Craft UK 281 C6 Card and Envelope pack of 50 - Mixed Bright

  • 50 100 gsm envelopes
  • Colours - bright
  • Smooth edge

4.7/5 from 146 reviews

Craft UK 863 8 x 8 inch Card and Envelope pack of 25 - White

Craft UK 863 8 x 8 inch Card and Envelope pack of 25 - White

  • Pack of 25 square plain white single fold
  • 25 matching white envelopes included.
  • Card size when folded approximately 8" X 8".
  • Envelopes are just over 8" in size to fit the card blanks....
  • Card weight 300gsm, envelope weight 100gsm.

4.7/5 from 297 reviews

Anita's A6 Card and Envelope, Pack of 50, White

  • High quality grade versatile stylish cardstocks are 100% recycled
  • The cards are pre-scored and can be used at portrait or landscape orientation...
  • The cards are made from 240 gsm card and the envelopes are made from 120 gsm card paper...
  • Folded size measures 148 mm length by 105 mm width
  • Available in white colour

4.5/5 from 285 reviews

Papermania A6 Recycled Kraft Blank Card and Envelope, Pack of 50

Papermania A6 Recycled Kraft Blank Card and Envelope, Pack of 50

  • High quality grade versatile stylish cardstocks are 100% recycled
  • The cards are pre-scored and can be used at portrait or landscape orientation...
  • The envelope will house non-embellished card
  • Folded size measures 14.8 cm length by 10.5 cm width
  • Available in recycled kraft brown colour

4.5/5 from 115 reviews

Anita's A6 Card and Envelope, Pack of 50, Pastel Pearlescent

  • High quality grade cards are eco friendly
  • The cards are pre-scored and can be used at portrait or landscape orientation...
  • The cards are made from 250 gsm card and the envelopes are made from 120 gsm card paper...
  • Smooth card finish which can be written on
  • Available in pastel pearlescent colour

4.5/5 from 75 reviews

Anita's Square Card and Envelope, Pack of 100, White

  • High quality grade versatile stylish white cardstock
  • The cards are pre-scored and can be used at portrait or landscape orientation...
  • The envelopes will house non/embellished cards
  • 100% recycled
  • Eco friendly and acid free

4.4/5 from 308 reviews

Anita's A6 Card and Envelope, Pack of 100, Cream

  • High quality grade versatile stylish cardstocks are 100% recycled
  • The cards are pre-scored and can be used at portrait or landscape orientation...
  • The envelope will house non-embellished card
  • Ideal for wedding, greetings and birthday
  • Available in cream colour

4.4/5 from 185 reviews

Paper/Card Sizes

Paper sizes can be pretty confusing. Though the ‘A’ system is organised in a logical way (A1 is bigger than A2, A2 is bigger than A3, etc), it can be tricky to remember which size is smaller than which. Just remember – the bigger the number, the smaller the paper.Let’s look at the dimensions of the most popular sizes:

Size Size in mm (h x w) Size in Inches (h x w)
A1 841 x 594 mm 33.1″ x 23.4″
A2 594 x 420 mm 23.4″ x 16.5″
A3 420 x 297 mm 16.5″ x 11.7″
A4 297 x 210 mm 11.7″ x 8.3″
A5 210 x 148 mm 8.3″ x 5.8″
A6 148 x 105 mm 5.8″ x 4.1″
A7 105 x 74 mm 4.1″ x 2.9″

Starting from A1 (the biggest), the sizes go down as if you have folded the previous sheet of paper in half.