A3 Paper Measurements (Metric/English)

A3 Paper Size Specifications


A3 paper is used widely throughout the world.  In the United States, Mexico, Canada, and the Philippines, this size and other ISO (International Standards Organization) paper sizes are in limited use only.  The naming convention "A3" comes from the ISO metric-based paper size measurement system.

View our A3 Paper products

The ISO measurements of A3 paper:

420 mm

A3 paper

(Metric system, mm = millimeters)


297 mm


By comparison to the English system of measurement, A3 paper is functionallyequivalent to B-Size paper, which measures 11" x 17".  The dimensions are not the same, but the relative paper sizes are similar.  11" x 17" paper in the United States is functionally equivalent to A3 paper in Europe or Japan, for example.

The English-based measurements of A3 paper (converted from metric):

16.54 in.

A3 paper

(English system, in. = inches)

Note:  dimensions converted from the metric measurements of A3 paper.


11.69 in.


Product availability in the United States:
Product information for inkjet, laser/copier paper for the A3 paper size and other ISO paper sizes, including A4 and A5 paper, is available from the cross-reference tables (indexed by paper size): 

Paper-size charts:    A3 paper   A4 paper   


We are passionate about supplying the best paper for you to complete your project successfully and on time. We know paper, so we sell only premium quality papers, all designed to make your projects look their best. Our knowledgeable customer service team is dedicated to fulfilling your paper needs in the best way possible, and we have only the highest quality products to accomplish this goal.

At Graytex we practice the Golden Rule - we treat customers the way we wish to be treated. Since our founding, 35 years ago, we have consistently attracted a loyal base of regular customers. If we do not have exactly what you need, we will gladly tell you where to find it if we can. Try us, you will like us guaranteed!

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It is true that Graytex Papers has the edge on paper stock, variety, hard to find paper types and sizes, and our professional shipping policies, but the biggest edge we have going for us is our customer service. You may do several print jobs a week, or less, or more, it doesn't matter, we want to help you make every project stand out with exceptional clarity, unbeatable eye appeal, and that feel of paper quality that tells your customers, guests, and associates that you know true luxurious quality.

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Take some time to browse our website pages before giving us a call. Spend some time discussing your paper and print needs with our experienced staff at 800-813-5828. We will find that perfect solution to make your print noticeably superior and memorably impressive. We offer the flexibility of customer ordering by phone or anytime ordering online using our secure website ordering page.

At Graytex, we are passionate about premium quality papers. Our Bright White papers are Number 1 grade, the highest quality paper available. Graytex Bright White papers are more opaque than most, which results in less bleed-through with your documents. This top-grade opacity allows for double-sided printing without show-through on your manuscripts. In addition, these papers provide premium brightness, increased richness, and greater smoothness than #4 papers. Your documents will not only feel luxurious; they will be printed accurately and be more visually stunning.