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Sale Price $14.44.
Original Price $18.05 Comp. value
per shirt
You save 20%
Fermat’s Spiral T-Shirt
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Style
Basic Dark T-Shirt
-$1.05
+$7.45
Color & Print Process
Dark Grey
Vivid Printing: White Underbase
About T-Shirts
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About This Design
Fermat’s Spiral T-Shirt
Patterns like this can frequently be found in nature and can be generated mathematically from Fibonacci ratios: the Fibonacci sequence runs 1, 1, 2, 3, 5, 8, 13... (each subsequent number being the sum of the two preceding ones). Otherwise known as the “golden ratio”, Fibonacci’s ratio has also been embraced by artists and architects who proportion their work accordingly because of its pleasingness to the eye.
Customer Reviews
4.7 out of 5 stars rating31.5K Total Reviews
31,479 Reviews
Reviews for similar products
5 out of 5 stars rating
By Jenny S.September 9, 2025 • Verified Purchase
Value T-Shirt, Black, Adult S
My 11 yo wore adult XL (5’7” 165#). The 8yo is small framed. She wore adult small and tied it in the back. Dark haired male wore adult large and 5’9”, 110# female wore adult medium . Good quality dark Heather gray, Gildan brand shirt. -it was next up from basic choice and cost about $20 per shirt. Not too thick or thin. Washed and dried well, no major shrinkage. Not see-through. Can wear a bra under it fine. Screen print is just as shown and well done, front and back.
5 out of 5 stars rating
By Jenny S.September 9, 2025 • Verified Purchase
Value T-Shirt, Black, Adult S
My 11 yo wore adult XL (5’7” 165#). The 8yo is small framed. She wore adult small and tied it in the back. Grandma wore adult large with long sleeve shirt underneath. Tall girl adult medium. Dark haired male adult large. Good quality dark Heather gray, Gildan brand shirt. -it was next up from basic choice and cost about $20 per shirt. Not too thick or thin. Washed and dried well, no major shrinkage. Not see-through. Can wear a bra under it fine. Screen print is just as shown and well done, front and back.
5 out of 5 stars rating
By Jenny S.September 9, 2025 • Verified Purchase
Value T-Shirt, Black, Adult S
My 11 yo wore adult XL (5’7” 165#). The 8yo is small framed. She wore adult small and tied it in the back. Good quality dark Heather gray, Gildan brand shirt. -it was next up from basic choice and cost about $20 per shirt. Not too thick or thin. Washed and dried well, no major shrinkage. Not see-through. Can wear a bra under it fine. Screen print is just as shown and well done, front and back. Everyone loved them!! .
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Other Info
Product ID: 235341744964422080
Created on: 1/14/2014, 6:58 PM
Rating: G
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