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Which Orange Circle Is Larger? (Optical Illusion) Postcard

4.9 out of 5 stars rating
15906 Total Reviews |
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18 pt thickness / 120 lb weight Soft white, soft eggshell texture
-$0.30
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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
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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.

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About This Design

Which Orange Circle Is Larger? (Optical Illusion) Postcard

Which Orange Circle Is Larger? (Optical Illusion) Postcard

Ask yourself and others this key question: Which orange circle is larger? Showcase the Ebbinghaus illusion with a dose of relative fun on any of these gifts. Caption explains the optical illusion: "Answer: The 2 orange circles are the same size, but the one on the left seems smaller due to being surrounded by larger objects. This phenomenon is known as the Ebbinghaus illusion." Also known as Titchener circles. Educational optical illusion gifts for all who enjoy visual humor. Make others do a double-take and look again and again today!
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Customer Reviews

4.9 out of 5 stars rating15.9K Total Reviews
14460 total 5-star reviews1012 total 4-star reviews212 total 3-star reviews82 total 2-star reviews140 total 1-star reviews
15,906 Reviews
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Very pleased with my order. All my prints were manufactured to a very high standard to my exact specifications and edited additions.
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By Suzi G.August 16, 2025 • Verified Purchase
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Fabulous create your own postcard turned out awesome 👍 I love the different colors and balloons a lot! .
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By Suzi G.September 17, 2025 • Verified Purchase
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This tropical card is so good 1🙂🙂The colors, borders, text fonts, all added up to 💯% satisfied customer!!!! 👍.

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Postcards
optical illusionillusionsbrain teaserpsychologycognitive effectsgeekebbinghaus illusionwhich orange circle is largerrelative size perceptionwords and unwords
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optical illusionillusionsbrain teaserpsychologycognitive effectsgeekebbinghaus illusionwhich orange circle is largerrelative size perceptionwords and unwords

Other Info

Product ID: 239482986128083659
Created on: 10/18/2009, 9:12 PM
Rating: G 
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