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Pi Day PiDay Chalkboard Education Postcard

4.9 out of 5 stars rating
15858 Total Reviews |
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Paper Type
Signature Matte
18 pt thickness / 120 lb weight Soft white, soft eggshell texture
-$0.17
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Size: Standard Postcard

Create your own vacation-worthy postcard! Any view you’ve seen, any monument you’ve fallen in love with, can all be added to your postcard with our personalization tool.

  • Dimensions: 5.6" L x 4.25" H; qualified USPS postcard size
  • High quality, full-color, full-bleed printing on both sides

Paper Type: Signature Matte

Our Signature Matte paper is a customer favorite—smooth to the touch with a soft eggshell texture that elevates any design. Its sturdy 18 pt weight and natural feel make it the ideal choice for timeless, sophisticated events.

  • Exclusively made for Zazzle
  • Made and Printed in the USA
  • FSC® Certified—sourced from responsibly managed forests that protect both people and planet

About This Design

Pi Day PiDay Chalkboard Education Postcard

Pi Day PiDay Chalkboard Education Postcard

It’s not irrational to know your Pi. Teacher posted the most significant digits in the circle shape of Pi along with the symbol in chalk. Celebrate Pi Day every March 14, which is also the birthday of Albert Einstein. Do you suppose this is just a coincidence or is it the secret power of math? Pi is one of the most important numbers in mathematics, so memorize at least 3.14 or 3.14159 before you dig into your pi day pie at your PiDay party.
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Rockford, Illinois
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Customer Reviews

4.9 out of 5 stars rating15.9K Total Reviews
14428 total 5-star reviews1012 total 4-star reviews208 total 3-star reviews80 total 2-star reviews130 total 1-star reviews
15,858 Reviews
Reviews for similar products
5.0 out of 5 stars rating
5 out of 5 stars rating
By Ray A.September 30, 2025 • Verified Purchase
Post Card, Size: Standard Postcard, Paper: Signature Matte, Envelopes: None
Very pleased with my order. All my prints were manufactured to a very high standard to my exact specifications and edited additions.
5.0 out of 5 stars rating
5 out of 5 stars rating
By Paul I.February 4, 2021 • Verified Purchase
Post Card, Size: Standard Postcard, Paper: Signature Matte, Envelopes: None
Creator Review
I had never seen these classic science fiction images and most of my friends have not seen them either. They are like little treasures! Amazing quality and fun to send people!
5.0 out of 5 stars rating
5 out of 5 stars rating
By Jennifer W.November 28, 2022 • Verified Purchase
Post Card, Size: Standard Postcard, Paper: Signature Matte, Envelopes: None
Zazzle Reviewer Program
I joined Postcrossing a few months ago and wanted postcards to represent my state well. I found them on Zazzle. I purchased numerous cards and was impressed with all of them. Excellent! The colors are beautiful. The cards have the exact look I wanted. I couldn't be happier.

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pi daypidaymathmathematicsnumberseducationchalkboardteacherschoolgeek
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pi daypidaymathmathematicsnumberseducationchalkboardteacherschoolgeek

Other Info

Product ID: 239582961483098987
Created on: 2/17/2019, 2:03 PM
Rating: G 
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